She's Missing, Bad

[BigIke]

Just got the half shaft u-joints fixed. She sat up for a week while I was out of town. Took her to Lafayette LA today, missing petty bad, down at least one hole. Been thinking about injectors for a while now. Think it's time?

The miss is there at start up and while hot, no change.

Miss is there with key off and on, runs better with the key on. There don't they all... 😂

It has Accel secondary injectors, and stock primaries. If like to send the lot in to RC for cleaning and Cal, but I don't think that is an option with the different secondaries. Should I buy Accel primaries?

Thinking about slapping new plugs in it tomorrow, these only have 22k on them. Installed new plugs when I got her 1.5 years ago...

If it's the injectors I'm going to go MSD coils and new wires while I'm there also...

Thanks Jay

[Vette73]

22,000 miles in one and a half years ? Lotta ZR-1 driving...
Good for you....

[BigIke]

I love this car!

There is a 96 LT4 collectors edition with 140k for sale for 7k that I want to buy to relieve spread the daily duty. Wife will not go for it!

Bought with 56k miles in October-14, just rolled 82k even I pulled in to the hotel last night... So I guess it's 26k miles lol!

Damn I love this car! Gonna go change the plugs now. ��

[BigIke]

Found the dead hole, no.8 plug was fouled.

Plugs didn't fix it, when I'm home I'll run a compression check and timing light check

Jerry, get my intake gaskets ready! Lol

Jay

[We Gone]

If it was fouled I would look at coil or plug wires next. sounds like no spark.

[BigIke]

https://scontent-dfw1-1.xx.fbcdn.net/v/t1.0-9/13015270_1319453414734651_4278085468561534675_n.jp g?oh=7f3e9ab27a0f3704ee48e9c42d8882f1&oe=57A8772A

She Gone - Thanks for the suggestion. I got my taxes for 2014 and 2015 done, finally... LOL When I pull the upper plenum off this time, there won't be a stone left un-turned... I'll install MSD coils, NOS wires (Jerry...) and maybe, if he still does it, get a ported upper plenum and injector housing... My timing light should be able to tell me if there is a misfire, a least a little. :proud:

Really wish I had another Vette to drive in the meantime, it is hard to daily anything else, when your daily is a ZR-Juan!

Wish the Maggie SRT-8 wasn't hurt too. She is throwing NAG1 (tranny) limp mode codes when I dip into the throttle too hard...

Jay

[We Gone]

Really wish I had another Vette to drive in the meantime, it is hard to daily anything else, when your daily is a ZR-Juan!

Jay

Everyone needs a backup ZR-1 :cheers:

[Kevin]

stock primaries? I may have found your problem...

[Hib Halverson]

Plug looks fuel-fouled to me.

Could be an injector problem.

Accel injectors, depending on when they were made, are either a Bosch pintle or a rotating disc injector. The stock injectors are ball and socket Delcos which have a habit of rusting, if there's any moisture in your fuel. If you have an injector which is stuck open, you see a plug like that.

I think you are better getting the same make and type of injector for all 16.

Order a set of RC Engineering injectors. Yeah, they are expensive but they work very well and last for a very long time.

In the car I just sold, I had a set of RCs which were installed in 1997. After that, I never had any injector issues again. They were in the car when I sold it late last month. I'll likely be dead before the new owner needs to replace them.

For more information on RCEngineering click here (http://www.rceng.com)

[BigIke]

Thanks Hib, I'm seriously looking into that. But there is a set of 275 / 335 pilot sport ps2, new on Houston CL for 1300 bucks lol

While leaving Lafayette today I missed a turn in the rain. Once turned around, I put her on the REV limiter in first gear. Blew the gunk out, miss gone. Parked it at O'rileys for 45 min while trying to find wipers that fit. I'll be dammed if it didn't gum up and start missing again. Put her on the limiter again, miss cleared; I didn't shut the car off again lol.

Got 17mpg on the way there and 25mpg on this return trip... :-)

Jay

[XfireZ51]

:salute:Thanks Hib, I'm seriously looking into that. But there is a set of 275 / 335 pilot sport ps2, new on Houston CL for 1300 bucks lol

While leaving Lafayette today I missed a turn in the rain. Once turned around, I put her on the REV limiter in first gear. Blew the gunk out, miss gone. Parked it at O'rileys for 45 min while trying to find wipers that fit. I'll be dammed if it didn't gum up and start missing again. Put her on the limiter again, miss cleared; I didn't shut the car off again lol.

Got 17mpg on the way there and 25mpg on this return trip... :-)

Jay

Have you thought about some Sea Foam. Maybe there's a valve that needs some cleaning.

[BigIke]

I did, i ran Sea Foam in it prior to leaving for my trip :)

[Hib Halverson]

(snip)

While leaving Lafayette today I missed a turn in the rain. Once turned around, I put her on the REV limiter in first gear. Blew the gunk out, miss gone. Parked it at O'rileys for 45 min while trying to find wipers that fit. I'll be dammed if it didn't gum up and start missing again. Put her on the limiter again, miss cleared; I didn't shut the car off again lol.

(snip)
Jay

I'm even more convinced you have a leaking or stuck injector. When you're blowing it out at WOT and that cylinder can use all the fuel that's leaking or flowing though a stuck injector.

You shut it off, and fuel flows out of the injector until the fuel pressure bleeds off. Then you restart and the plug fouls because of excess fuel which was there when you started the engine and the additional excess fuel flowing from the injector at light throttle.

As for Sea Foaming because the engine might have a "stuck valve"...come on people, what are you guys smoking? The engine has a plug that's fouling due to too much fuel, not a stuck intake or exhaust valve. Sea Foam is primarily naptha mixed with a light oil and it's not going to fix problem like this. The two best things about Sea Foam are the company's marketing and the money the owners are making because a good part of the Internet DIY community believes Sea Foaming an engine can solve just about any performance or drivability problem known to man. In fact, Sea Foam is a crappy injector cleaner because it's solvent-based and, if you use high enough concentration to actually clean an injector, it attacks rubber and plastic parts in the fuel system. If you want to fool with pour-in solutions to cases of injector fouling, you need to use a detergent-based injector cleaner such as Chevron Techron or Red Line Complete Fuel System Cleaner. Because they are detergent-based, they won't attack fuel system parts so you can use as much as you want, but, I digress...

"BigIke", run the fuel pressure tests in the Factory Service Manual. That will tell you conclusively, which way to go with a repair. I'm betting on an injector that's stuck.

If all the Sea Foam fan boys here think I'm :blahblah: off base, heck, prove me wrong! Put a couple of cans in "BigIke's" gas tank and let me know what happens to that fouled plug. :-D

In the meantime, I see a plenum pull in "BigIke's" future.

[BigIke]

I'm abut to buy 16 Bosch injectors, I'very no allusions regarding the mechanic in a bottle. Except for blue devil, that stuff works. I tossed seafoam initial before I went to Lafayette. Injectors, Wires, coils and gaskets are soon ordered.

[Hib Halverson]

I'm abut to buy 16 Bosch injectors, I'very no allusions regarding the mechanic in a bottle. Except for blue devil, that stuff works. I tossed seafoam initial before I went to Lafayette. Injectors, Wires, coils and gaskets are soon ordered.

If they are Bosch pintle type injector, know that a pintle injector is a downgrade from even the stock Delco ball/socket type.

Lots of "injector guys" sell the Bosch pintle injectors really cheap because Bosch sells them cheap now that the development has long been paid for.

The best type, and, unfortunately, sometimes the most expensive type, are the rotating disc injectors sold by RCEngineering and some other vendors. If I was putting out for 16 new injectors, that's what I'd order.