86 Vette won't start
Thread Starter
6th Gear
Joined: Sep 2015
Posts: 6
Likes: 0
86 Vette won't start
I replaced the stock injectors with 42 lb. Mustang injectors. I drove it for 3 hours but it still ran rough, it wouldn't compensate. The next time it started it had smoke coming from underneath and from the dash vents. Now it won't start. I checked the spark at the plugs with a spark checker, checked fuel pressure with a gauge and the injectors with a tool made for that. Everything was OK. It has had the key resistor bypassed. Still won't start. Any ideas?
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
42 lbs is way too big. The ECM can't compensate for injectors that big. When you're in open loop mode the ECM will make the injectors pulse as if they were 22 lb injectors and put way too much fuel into the cylinders. You will run super rich.
Safety Car
Joined: Jun 2000
Posts: 4,870
Likes: 25
From: Long Island, NY
I replaced the stock injectors with 42 lb. Mustang injectors. I drove it for 3 hours but it still ran rough, it wouldn't compensate. The next time it started it had smoke coming from underneath and from the dash vents. Now it won't start. I checked the spark at the plugs with a spark checker, checked fuel pressure with a gauge and the injectors with a tool made for that. Everything was OK. It has had the key resistor bypassed. Still won't start. Any ideas?
If not, then you just flooded the Cylinders.
Vic
Thread Starter
6th Gear
Joined: Sep 2015
Posts: 6
Likes: 0
No I didn't. From what I read in forums the ECM would learn itself. Guess that was wrong, looks like I will have the originals cleaned, replace the o rings and reinstall. Thanks for all replies.
Race Director
Joined: Mar 2015
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change the oil.
Last edited by antfarmer2; Aug 30, 2016 at 01:47 PM.
Safety Car
Joined: Jun 2000
Posts: 4,870
Likes: 25
From: Long Island, NY
I am pretty sure all the plugs are wet. Pull them and check them.
Vic
