Fuel injector problem questions?
Thread Starter
Navigator
Joined: Sep 2002
Posts: 9
Likes: 0
From: Staten Island N.Y.
Fuel injector problem questions?
3 weeks ago I started the car for the first time in about 2 months, sounded like it had a slight miss, and wouldn't accelerate over 1500rpm. I put it away and worked on it the following week. I figured the gas went stale so I removed it and put 8 gallons of fresh fuel in, now she wouldn't start. Did some quick tests and found that I had spark, engine cranks, but wont start. I figured maybe air in the system, I bleed the system, still no start. Figured now my problem was more in depth, inspected spark plugs and changed due to carbon build up, tested for spark and found ok, wires ok, distrubutor cap and rotor replaced because I figured it needed it. I figured the ignition system is ok. Now for the fuel side. Fuel pump registers acceptable voltage, I have 42psi at the fuel rail, I also had my brother crank the car while I had the relief valve open on the fuel pressure gauge and I'm getting flow. Checked the fuel injector with noid lights and found power there. So I'm pretty sure its my injectors. What do you think?
Now I'm up in the air weather to replace the injectors with OEM, the same that are in there or the GEN III's. I would like to keep the car all original. What are your suggestions?
Thanks in advance!
Now I'm up in the air weather to replace the injectors with OEM, the same that are in there or the GEN III's. I would like to keep the car all original. What are your suggestions?
Thanks in advance!
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
You need to do an ohm test on the injectors, it will tell you whether they're bad or not. Also check out this link...
http://forums.corvetteforum.com/c4-t...questions.html
http://forums.corvetteforum.com/c4-t...questions.html
Thread Starter
Navigator
Joined: Sep 2002
Posts: 9
Likes: 0
From: Staten Island N.Y.
I did an ohm test and 3 are reading 5 while the rest are reading around 16. This is the first time I stored the car without using a fuel stablizer, I think they might have laquared up and are clogged or sticking. If 3 are bad would it prevent the car from starting?
Drifting
Joined: May 2005
Posts: 1,336
Likes: 12
From: Chicago Executive Airport, formerly known as Palwaukee
No-IL Events Coordinator
St. Jude Donor '12-'13-'14-'15-'16-'17
Check out my thread about Jon's Bosch Design IIIs for my LT4. Different engine than yours, but the theory and replacement of injectors still applies.
http://forums.corvetteforum.com/c4-t...long-read.html
SAVE the WAVE!
http://forums.corvetteforum.com/c4-t...long-read.html
SAVE the WAVE!
Pro
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
Don't waste your time or money
3 weeks ago I started the car for the first time in about 2 months, sounded like it had a slight miss, and wouldn't accelerate over 1500rpm. I put it away and worked on it the following week. I figured the gas went stale so I removed it and put 8 gallons of fresh fuel in, now she wouldn't start. Did some quick tests and found that I had spark, engine cranks, but wont start. I figured maybe air in the system, I bleed the system, still no start. Figured now my problem was more in depth, inspected spark plugs and changed due to carbon build up, tested for spark and found ok, wires ok, distrubutor cap and rotor replaced because I figured it needed it. I figured the ignition system is ok. Now for the fuel side. Fuel pump registers acceptable voltage, I have 42psi at the fuel rail, I also had my brother crank the car while I had the relief valve open on the fuel pressure gauge and I'm getting flow. Checked the fuel injector with noid lights and found power there. So I'm pretty sure its my injectors. What do you think?
Now I'm up in the air weather to replace the injectors with OEM, the same that are in there or the GEN III's. I would like to keep the car all original. What are your suggestions?
Thanks in advance!
Now I'm up in the air weather to replace the injectors with OEM, the same that are in there or the GEN III's. I would like to keep the car all original. What are your suggestions?
Thanks in advance!
Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
Jon does a great job answering questions and I appreciate his help on my 93. The guy that I bought mine from had just put new injectors in, but they were the wrong ones due to a difference for the '93 model. I called Jon and he knew immediately the problem and sent out new ones, and what a change they made. I heard something about a new Bosch 4 series, but not sure if those are for the LT1 or a different engine. If your car is only a show car than use stock GM, but if you want to drive it with reliability go with the Bosch from F.I.C. Great Service!!!
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Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
Are you referring to the bosch 4's? I may have made an error when reading the ad, They were Bosch EV 14. I don't think I saw the EV and was thinking Roman Numeral IV when I saw the 14. Sorry for the mistake.
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
please just get BOSH 3 injectors, it is easy, and FIC is a great guy to work with. when I pulled my old ones last week, I could see they wre just old junk, and the new gas will wreck your old ones.
you should get all the replacement gaskets if it is stock intake, and seals for injectors
more than everything you need to do in a couple of hours
you should get all the replacement gaskets if it is stock intake, and seals for injectors
more than everything you need to do in a couple of hours
