Re: Ruff Idle ,Huge Loss of Power
 

Re: Ruff Idle ,Huge Loss of Power
 

Bit off topic but thought you might enjoy this .
Kid puts me to shame with his mechanical skills and he can get to the tight spots easy lol . One lucky boy to be working on a ZR-1 so young .

https://www.youtube.com/watch?v=pXWg84w98l4

Re: Ruff Idle ,Huge Loss of Power
 

Cool Kid! That’s how you get them started early. I wonder if his dad or grand dad are members here?
H
:cheers:

Re: Ruff Idle ,Huge Loss of Power
 

Hi Mike,

How did you go sorting your Ruff Idle, loss of power issue?

Have experienced this multiple times.

Cheers

Re: Ruff Idle ,Huge Loss of Power
 

Hey . How's things .

Just got off the phone with Marc Haibeck and ordered the DVD plenum pull video and the throttle body bypass tube . Since I am draining the car by 2 litres as per Marc's instructions , I may as well install the bypass .

Also when talking to Marc and I told him what the car was doing he told me I did not have to tell him anymore info as it is definitely the FPR .

Been in contact with Phil also and once I get the FPR out I will mail it to Phil to be modded .

Looks like this will be a month or 2 process but the beast will run again .
Also have to call Jerry's Gaskets and order new o rings for the injectors .

FPR .

Mike

Re: Ruff Idle ,Huge Loss of Power
 

So you have also had this issue ? Have you replaced the FPR ? Did you giVe Marc Haibeck a call or hit up the issue on this forum ? Just curious how you got it sorted and what where the issues if not the FPR .

Thanks



Mike

Re: Ruff Idle ,Huge Loss of Power
 

hooked up the pressure gauge

and it stays at 48 psi . I did not start the engine ,only with key on .


Thanks



Mike .

Re: Ruff Idle ,Huge Loss of Power
 

Tight fit but I was able to attach a fuel pressure gauge . With key on , pressure held at 48 psi for 3 minutes or so .

Thanks



Mike

Re: Ruff Idle ,Huge Loss of Power
 

Added some lighting to do the operation . Be going in next week .
Plenum, Injectors , FPR removal
https://uploads.tapatalk-cdn.com/201...c25379e9e0.jpghttps://uploads.tapatalk-cdn.com/201...c223f3e2c4.jpghttps://uploads.tapatalk-cdn.com/201...8a30885f6c.jpg

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Re: Ruff Idle ,Huge Loss of Power
 

Found an interesting way to drain the plenum , unless some of you guys already have done this . I hooked a small hose to the glycol fluid tube at the lowest point of the plenum towards the firewall on the right side . Then the fluid will automatically syphon out into a lower point , in this case , a measured dish for 2 litres marked so I knew how much I removed . Obviously radiator fill cap is removed or open. You will hear the fluid syphon out and just watch your fill dish level and pinch off the the hose or remove it and voila, no fluid in the plenum .

I tried using a mechanical way to suck out the glycol , but nothing was happening so then tried the hose trick and that worked great .

https://uploads.tapatalk-cdn.com/201...cead7bb96d.jpghttps://uploads.tapatalk-cdn.com/201...ba34844a44.jpg

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Re: Ruff Idle ,Huge Loss of Power
 

Thanks for the tip.

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Re: Ruff Idle ,Huge Loss of Power
 

I found there is still a little bit of glycol in the plenum when i lifted it up a bit so put a rag or paper towels to grab the spill. Mark Haibeck , in his plenum removal video states that there will still be fluid in the plenum when you lift it so be prepared .



Mike

Re: Ruff Idle ,Huge Loss of Power
 

Plenum off and injectors removed . Used one of my plastic panel removal tools to work the injectors out . Worked like a charm . Injectors popped out with very little struggle .https://uploads.tapatalk-cdn.com/201...a57c0644a1.jpghttps://uploads.tapatalk-cdn.com/201...b0e4aec571.jpg

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Re: Ruff Idle ,Huge Loss of Power
 

Hi Mike,

Good to see that you are hopefully getting to the bottom of your issues. I am looking forward to seeing if this fixes the idle and power issues.

I took the Z out for a drive yesterday and the car ran very well. What was interesting though, was when the A/C was turned on, my rough idle and loss of power seemed to return.

The car started to get sloppy again when stopped at lights and in traffic.

Once the A/C was switched off, it drove a lot better (even with the bigger cams and the run-in tune )

Anyway food for thought.

Cheers

Joel

Re: Ruff Idle ,Huge Loss of Power
 

Hey Joel . That is strange indeed . Maybe the guys on the forum can help . Start a new thread perhaps . The AC was not an issue with our car . It felt like it was flooding or running on only a few cylinders . All vacuum hoses where attached when I removed the plenum other than the FPR vacuum line which kept popping off which hinted at the FPR may be the issue and failed . No fault codes appeared either .
Jagpanzer just finished up my FPR which is now a IFPR . Hope to get it back sometime next week . I still have to replace all the o-rings on the injectors and of course the fuel lines going into the IFPR . I thought it might be easier to do the o-rings with the fuel rails attached to the IFPR . I am also using 2 stroke motor oil as my lube to insert the injectors and 0-rings . Looking forward to putting it back together .

Mike

Re: Ruff Idle ,Huge Loss of Power
 

Joel,

If u have bigger cams(and I presume u ported top end), the additional load ur putting on motor when turning on A/C is causing the ECM to use a different part of the VE and SA tables. If u haven’t addressed those areas while tuning, its likely they’re inadequate for handling the A/C request. Plus, the bigger cams lower the overall vacuum at idle so u will probably need to increase IAC steps to maintain idle w the additional load. Maybe even SA.
What happens is that the motor starts to oscillate as the ECM tries to maintain idle and stall saver kicks in. The stock tune will have too much compensation for the larger cams and u get a seesaw effect.

Re: Ruff Idle ,Huge Loss of Power
 

Got the rebuilt IFPR yesterday . Thanks Phil . This adds some serious bling to the motor . Looks amazing .
Replacing O-rings today on fuel rail and fuel lines to IFPR .

https://uploads.tapatalk-cdn.com/201...b1a6bb3924.jpg

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Re: Ruff Idle ,Huge Loss of Power
 

Assembled IFPR to fuel rails.
Hoping to install the plenum tomorrow after functional tests are completed as per Marks instructional Plenum video shows . https://uploads.tapatalk-cdn.com/201...1a83195cbd.jpg

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Re: Ruff Idle ,Huge Loss of Power
 

IFPR and rails back in place . https://uploads.tapatalk-cdn.com/201...acf9a89671.jpg

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Re: Ruff Idle ,Huge Loss of Power
 

System back together . Huge thanks to Marc Haibeck for his instructional Plenum Removal and Plenum reinstallation video . I would have been beyond lost without his help . Now that it's back together, running much better with the IFPR from Phil but still down on power and a ruff idle . I am taking the car to my local garage to have a look and have them hook it up to do a diagnostics .

Mike

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Re: Ruff Idle ,Huge Loss of Power
 

Hi Paul . So the amp draw is only 7 amps and the fuel pressure reading was at 47 psi [emoji849][emoji3525][emoji853]

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Re: Ruff Idle ,Huge Loss of Power
 

You have at least one bad pump. Pull the FP1 pump fuse and check again. That will give you the reading for FP2. Subtract that number from the combined number (in your case 7 amps) and you’ll have the reading for FP1. You might as well just replace both pumps while your in there.
H
:cheers:

Re: Ruff Idle ,Huge Loss of Power
 

Thanks . Yes , if one is bad , may as well change both . thanks again for all the help Ccmano and :cheers: from everyone on the forum .



Recommendations for which pump to purchase ?

1995 ZR-1









Mike

Re: Ruff Idle ,Huge Loss of Power
 

So we have been looking at getting a pump for the Z but man , its confusing as hell . There seem to be a plethora of numbers and make's , so which do you guys recommend for a 1995 ZR-1 ?

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Re: Ruff Idle ,Huge Loss of Power
 

Hi Mike, we are having a maintenance day this Saturday at Jim's....wish you were here. I have 2 extra sitting on my shelf. I use Electric Performance fuel pumps part number:
P-240KC. I think I got them at RockAuto. If you have any problems finding them, let me know and I will put my 2 in the mail to you.

Re: Ruff Idle ,Huge Loss of Power
 

Hey Charlie . Last I looked , they were out of stock .

Thanks

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Re: Ruff Idle ,Huge Loss of Power
 

I willl check again tomorrow . Do they also have the socks and gaskets ?
Thanks


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Re: Ruff Idle ,Huge Loss of Power
 

Just checked and they have them for a great price, $18.13 each! Yes the kit includes the socks and gaskets
https://www.rockauto.com/info/166/P240KC__ra_p.jpg

Re: Ruff Idle ,Huge Loss of Power
 

Awesome thanks . Guess I was looking at the wrong site . I was looking for the entire unit but this will work indeed .



Mike

Re: Ruff Idle ,Huge Loss of Power
 

Order 2

Re: Ruff Idle ,Huge Loss of Power
 

Sure did ;)

Re: Ruff Idle ,Huge Loss of Power
 

Changed out the fuel filter today . Gas that spilled out of it looked rusty . Also retested the amp draw on the fuel pumps , 8 amps now .
I also pulled the plugs and found one that was whitish . The others looked grey or slightly dark in color . The whitish plug was either number 5 or 7 .
Also engine runs very smooth at 2000 + rpm but still has a rough idle .
With the one plug looking off , is it ok to take the car out for an Italian tuneup or just a simple test drive ?
From reading the manual and searching online , white means lean . I don't want to hole a piston .
Thanks
Mike

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Re: Ruff Idle ,Huge Loss of Power
 

Had some fun today . Replaced both fuel pumps . Found out after installation that one of the pumps did not work . So removed the sender and tried both of the old pumps . I can get the sender in and out in under 5 minutes now . The old pump and the new pump are both reading 3 amp draw now ?
What givez ? Why am I reading 3 amps on the new pump ? :(
RockAuto is sending me a new pump .

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Re: Ruff Idle ,Huge Loss of Power
 

Do u see any flecks of metal in the ceramic insulator? If u r datalogging, are u picking up any knock?

Re: Ruff Idle ,Huge Loss of Power
 

I am clueless as to what you just asked me . Sorry .

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Re: Ruff Idle ,Huge Loss of Power
 

Pull a few spark plugs and see if there are any specks of metal embedded in the ceramic (insulator) portion of the tip. If there is, that would confirm detonation.
If not, then although those cylinders may be running lean, u likely don’t have a danger of “holing” a piston.

Re: Ruff Idle ,Huge Loss of Power
 

Morning . There is only the one plug, #5 that is white or light grey in colour . I will look closer for specs . Thanks .
Since changing out fuel filter, car runs slightly better but still ruff idle , low on power .


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Re: Ruff Idle ,Huge Loss of Power
 

Any idea where I can get a new float/plastic foam for the fuel level arm ? The one on our car is cracked and is absorbing fuel .

Re: Ruff Idle ,Huge Loss of Power
 

I have one for you if I can find it.
PM your address.


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Re: Ruff Idle ,Huge Loss of Power
 

Found the one I have
Attachment 11218


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