Finally pulled the zr-1 out of storage

[Kevin]

And now to take her on a shake down run and see what issues I'm dealing with this year. working on getting a handle on what I need to do get her running right again. Hopefully I can get it nailed down soon and get back to not wanting to never drive her agian.

[XfireZ51]

And now to take her on a shake down run and see what issues I'm dealing with this year. working on getting a handle on what I need to do get her running right again. Hopefully I can get it nailed down soon and get back to not wanting to never drive her again.


That's the spirit Kevin.

[Dynomite]

And now to take her on a shake down run and see what issues I'm dealing with this year. working on getting a handle on what I need to do get her running right again. Hopefully I can get it nailed down soon and get back to not wanting to never drive her agian.

Lets Get it running perfectly.......if I were closer.......I would spend some time on that car with you :handshak:

[efnfast]

Mines still sleeping waiting for the seats to be recovered. I'm jealous.

[Z06scentair]

:happy1::happy1:And now to take her on a shake down run and see what issues I'm dealing with this year. working on getting a handle on what I need to do get her running right again. Hopefully I can get it nailed down soon and get back to not wanting to never drive her agian.

Pictures?

[XfireZ51]

Mines still sleeping waiting for the seats to be recovered. I'm jealous.

Mine is not asleep but it is waiting for seat covers. Aren't u headed to BG, Steve?

[Kevin]

:happy1::happy1:

Pictures?

http://i.imgur.com/D3wdDPg.jpg

http://i1181.photobucket.com/albums/x438/lt5zr180/myzr1/IMG_1517_2.jpg

[Kevin]

Lets Get it running perfectly.......if I were closer.......I would spend some time on that car with you :handshak:

appreciate it mate

[Dynomite]

Very nice ZR-1 Kevin :thumbsup:

We need some background on mileage and what has/has not been modified and what has and has not been diagnosed. And we need information on what the issues are/when/how did issue first become noticeable and just a bit of information on maintenance (fluids used/changed and parts replaced).

Then lets fix it :handshak:


http://i1181.photobucket.com/albums/x438/lt5zr180/myzr1/IMG_1517_2.jpg

[Blue Flame Restorations]

Beautiful 90!! Can't wait for you to be back in the drivers seat!

[Dynomite]

Beautiful 90!! Can't wait for you to be back in the drivers seat!

90' with Charcoal canister up front........I think I see the vacuum line on clip in front of power steering reservoir :p

[Kevin]

Very nice ZR-1 Kevin :thumbsup:

We need some background on mileage and what has/has not been modified and what has and has not been diagnosed. And we need information on what the issues are/when/how did issue first become noticeable and just a bit of information on maintenance (fluids used/changed and parts replaced).

Then lets fix it :handshak:

I'm going to get with a few local owners and hopefully tackle this soon and get her driving again.

[Kevin]

90' with Charcoal canister up front........I think I see the vacuum line on clip in front of power steering reservoir :p

totally stock 90 except for a chip from marc

[Dynomite]

totally stock 90 except for a chip from marc

Marc's chip for stock or slightly modified 90's (http://www.zr1specialist.com/HAT%20Web/products/Calibration%20AYBKG.htm)

Can we assume the 90' ran great before the chip installation and after the chip installation for some time?

I have no less than 8 chips from Marc for 90' (L98), 90' LT5s, and 91' LT5 and all function perfectly (87 Octane and 91 Octane chips - spark timing for Knock). Carters fuel line billet bracket has 91' on one end and 87' on the other end so I can tell right away (from the end showing) which chip is installed ;)

So I doubt you have a chip issue :cheers:

How many miles on the 90'?

What can we assume about Injectors, Plugs, Plug wires, Ignition coils?
Can we assume you have 50 lbs more or less fuel pressure?
Can we assume your vacuum pump is NOT constant running but does cycle?
And can we assume your issue is not only after 5,000 rpm at WOT?
Can we assume your fuel is clean and no water?
I guess we can assume your MAP vacuum line is fully connected?
We shall assume your compression is within 5-10 psi on all cylinders and 210-230 psi more or less.

Don't mean to jump all over this but these ZR-1s are to be driven and not miserable broken down money grubbing no fun hobbies :D
In my case the ZR-1s are an extremely fun DUAL Hobby (driving them and modifying them) ;)

I'm going to get with a few local owners and hopefully tackle this soon and get her driving again.
Perfect.....Having hands on is a lot better than trying to fix issues remotely :thumbsup:

[efnfast]

Mine is not asleep but it is waiting for seat covers. Aren't u headed to BG, Steve?
My seats are suppose to be ready Thursday, he's only had them for 4 months. I am going to BG, and the mountain run. I'm riding shotgun with Doug (Mystic ZR-1). See you there Dom.

[Paul Workman]

totally stock 90 except for a chip from marc

Kevin, I'm "packin'" when I get to BG - tools/scanner/VOM, etc. With that and all the talent gathered together there, we should be able to run dem gremlins to ground - or at least corner them to be dealt with later. Are you going to be there??? (I recognize that frustration. From time to time it haunts me too. I live in a "remote" area too, which means - like you - nobody near me that could just "drop by" for a brew and some wrenching. At times I've felt overwhelmed too. But, endeavor to persevere and realize it is a hobby - your baby needs you! (Yes, this is a pep talk. However, the thing is, I'm not sure if the audience is you or me!:wink:)

BTW, beautiful 90! Looks very familiar!!!

[Kevin]

Marc's chip for stock or slightly modified 90's (http://www.zr1specialist.com/HAT%20Web/products/Calibration%20AYBKG.htm)

Can we assume the 90' ran great before the chip installation and after the chip installation for some time?

I have no less than 8 chips from Marc for 90' (L98), 90' LT5s, and 91' LT5 and all function perfectly (87 Octane and 91 Octane chips - spark timing for Knock). Carters fuel line billet bracket has 91' on one end and 87' on the other end so I can tell right away (from the end showing) which chip is installed ;)

So I doubt you have a chip issue :cheers:

How many miles on the 90'?

What can we assume about Injectors, Plugs, Plug wires, Ignition coils?
Can we assume you have 50 lbs more or less fuel pressure?
Can we assume your vacuum pump is NOT constant running but does cycle?
And can we assume your issue is not only after 5,000 rpm at WOT?
Can we assume your fuel is clean and no water?
I guess we can assume your MAP vacuum line is fully connected?
We shall assume your compression is within 5-10 psi on all cylinders and 210-230 psi more or less.

Don't mean to jump all over this but these ZR-1s are to be driven and not miserable broken down money grubbing no fun hobbies :D
In my case the ZR-1s are an extremely fun DUAL Hobby (driving them and modifying them) ;)


Perfect.....Having hands on is a lot better than trying to fix issues remotely :thumbsup:
I want to be clear, it is not marc's chip that's the problem I've been nothing but overjoyed about his chip. I talked to him and we found out I had revision 0 in the car, bought one just after he did his first talk in BG years ago, he's now on revision 4. He swapped chips for me for free. Marc is hell of a guy and we're lucky to have him.

The only other "engine" mod I have is a Coplan air duct.

Car has 62 or 64,000 on it. I forget. In the last two years I've had to do NEW FIC injectors, gaskets, plugs and wires that was two years ago. Last year was the AC compressor which is when the problem started. It started falling on it's face a bit under WOT, driving to carlisle I'd roll into the throttle at 70 in 5th and the car would miss and bang, same thing at WOT and it got worse the longer I drove. Had marc look at the car, tested the secondaries and it all checked out. He drove the car, told me I need a new clutch in 10,000 miles...which gives me like 10 years...of course the car wouldn't misbehave. Drove home, 1-3 gear pull and she pulled hard, blew the tires off in second and pulled hard in third. an hour later the miss was back

Got her home, called a buddy he sent me a 94 ecm, swapped that and my chip car stopped missing/banging. 1-3 was a decent pull but not as hard as it should be but no banging! stuck it in 5th went WOT and around 2500 rpms check engine light came on. Got home, pulled the codes and it was a low vac code, don't remember which one. Before that, with the old ecm, I had a DIS module code. I'd have to look at my old emails to Marc to be sure what they are. I haven't really driven it since the old ecm went back in, I was worried about damaging the car.


What can we assume about Injectors, Plugs, Plug wires, Ignition coils? yes, yes, yes, no
Can we assume you have 50 lbs more or less fuel pressure? ummmm sure
Can we assume your vacuum pump is NOT constant running but does cycle? Marc checked it and it passed but still set a low vac code at 2500 rpm in 5th
And can we assume your issue is not only after 5,000 rpm at WOT? yes
Can we assume your fuel is clean and no water? seems a safe bet
I guess we can assume your MAP vacuum line is fully connected? Marc checked it and I have it zip tied
We shall assume your compression is within 5-10 psi on all cylinders and 210-230 psi more or less. no bleeding idea mate

As I said I'm talking with a few local owners and a few further afield who are willing to help and if they can't help a buddy of mine who works on his own ferraris and I are going to try and tackle this. What makes me the most angry about this is it's a stock car. I haven't had it worked over by 6 different shops. It's more or less how it left chev.

I've been chasing one problem after another for the last 6 years and it's right around $1000 a year in issues, last year was $1500. the ac replacment on my parents HOUSE cost less then the replacement on the zr-1 and I still need tyres for the car. I can't afford the gsd3's I want so I'm looking at nt05s. I'm not ashamed to say that I'm a bit over my head with this car both mechanically and monetarily. My wife and I have come upon a rough patch the past couple years. She had a hard time finding a well paying job and I've failed completely. We were starting to come out of it when we found a condo we wanted which will be a nice upgrade for us but has drained our savings for the foreseeable future. If I told her I needed a stack of cash to drop on this car she'd kill me. For the last few years I've been more excited to put this car away then I was to drive it.

[Kevin]

Kevin, I'm "packin'" when I get to BG - tools/scanner/VOM, etc. With that and all the talent gathered together there, we should be able to run dem gremlins to ground - or at least corner them to be dealt with later. Are you going to be there??? (I recognize that frustration. From time to time it haunts me too. I live in a "remote" area too, which means - like you - nobody near me that could just "drop by" for a brew and some wrenching. At times I've felt overwhelmed too. But, endeavor to persevere and realize it is a hobby - your baby needs you! (Yes, this is a pep talk. However, the thing is, I'm not sure if the audience is you or me!:wink:)

BTW, beautiful 90! Looks very familiar!!!

Thank you for the compliment, you may have seen it at carlisle or BG years ago. I haven't been there since 06 though. I just can't justify it. I used to go to BG with my father but he's not interested anymore and I'm not making a 20 hour round trip in a car I don't trust. I keep thinking about flying down but I hate using vacation money on a trip my wife won't go on. So to answer your question, no I won't be at BG.

[USAZR1]

An admirable quality to have is patience and you seem to have it in spades,Kev.
Hang in there,pal.

[Kevin]

Thanks Clint.

[Kevin]

Haven't even touche the car this year, had someone else pick it up for me since I was out of town and couldn't get the car out before I had to leave, and I just can't be bothered with it. I'm considering selling...again. Someone talk me out of it

[We Gone]

Kevin.
All I can say is if you need to sell it do so, Just get another you will be lost without a ZR-1. Other cars may be newer and faster but there will only ever be one KOTH.. Best of luck to you.

[Dynomite]

Haven't even touche the car this year, had someone else pick it up for me since I was out of town and couldn't get the car out before I had to leave, and I just can't be bothered with it. I'm considering selling...again. Someone talk me out of it

Kevin....I understand your frustration...you did say you had a DIS Code earlier.....what was that about?

Here is another chap in the same position as you just today on CF. The reason I mention this is he like yourself just does not have or use tools and is not a fix it yourself person....so it becomes very difficult to even chase down the simple issues (most are simple with the LT5 and NOT disaster unless you suck up some bolts into the intake or blow a timing chain). What you and the chap on CF need ASAP are some friends familiar with the LT5 to drop over and take a look...I cannot say it any simpler for you :handshak:

The Chap on CF PMed me just today (I get these requests occasionally)......
Hi, I hope you can help me. My 91 ZR1 has a rough idle and under load it misses badly. At highway speeds for instance, it seems to run ok on level roadway, but going up hills it sputters and misses when I apply the throttle. This happens with the power key on or off. Less that a year ago I had the injectors replaced with new FIC ones, new plug wires, new plugs and one new coil. The work was performed by the local Chevy dealer, as I am unable to do the work myself. I have checked the MAP hose and it is still on. I would appreciate any help you could give. Thanks!

Here is my quick response......but again....what this chap really needs is a guy like any number of us on this Forum to drop by with a spare ECM (maybe spare DIS) and take a look.
Hi:

Well......hmmmm....Lets start assuming....
1. Lets assume the Z ran perfectly after the Chev dealer did the work described.
2. Lets assume this issue started gradually.
3. Lets assume (BIG assumption) that the items replaced are working perfectly (no coil issues , including the coils not replaced) no injector issues, no plug issues, no plug wire issues.
4. Lets assume your vacuum pump cycles off indicating proper vacuum is reached for secondaries (even though you have another issue).
5. Lets assume you have no major vacuum leaks (plemum, IH).
6. Lets also assume you have good compression on all 8 cylinders (210-230 lbs within 10 lbs each cylinder).
7. Lets further assume it is not some rare failure of the ECM, or Ignition Module.

What we have left is fuel pressure (fuel pumps), Camshaft timing, Camshaft position sensor, maybe bad gas (water in gas).....and maybe some odd issue I have no clue from the description (like spark plugs loose).

So.....are my assumptions correct and you would have to test/verify that those assumptions are correct. Anything can happen...and can happen within minutes of installing something in new condition.

As an example...I installed a NEW Water Pump...took the Z for a spin (no pun intended) and the impeller spun off the water pump shaft giving me a rise in coolant temperature I could not imagine the cause (but I caught hold of myself and then imagined the impeller spun free on the shaft).

I guess what I would do if you are sure of the assumptions listed above....start with items not checked yet including fuel pressure, spark plug installation and maybe (something I always do on a New Z) do a compression check on all 8 cylinders.

Let me know your thoughts and post up for others to consider possibilities for you.

I will think further on the issue for you and PM you any further thoughts.

Cliff

Kevin.....what you need is a local group of avid LT5 do-it-yourselfers to help you...... :handshak:

[Kevin]

the dis code went away when I changed the ECM so i'm going to chock that up to a bad ecm. What I need is someone to walk me through a few things and I'll be fine...maybe. Like I said I have a friend locally who's willing to help but he doesn't own a zr-1 but he wrenches on his Ferraris.

[Bearly Flying]

One thing I found during a dynotune yesterday, I was running rich across the board, the only change was new FIS fuel injectors. It appears that the newer fuel injectors do a better job of atomizing the fuel. We dropped out about 20 % of the fuel across the table.

Only bad thing is that it will roast the tires anytime you step on it now....

[Kevin]

One thing I found during a dynotune yesterday, I was running rich across the board, the only change was new FIS fuel injectors. It appears that the newer fuel injectors do a better job of atomizing the fuel. We dropped out about 20 % of the fuel across the table.

Only bad thing is that it will roast the tires anytime you step on it now....

not seeing anything to make me think this is a fuel issue