Starting problems
Thread Starter
Staging Lane
Joined: Dec 2009
Posts: 90
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Starting problems I'm having some problems with the way my 94 Trans Am starts. It will crank without firing, let off the key and hit it again and it will fire right up. Hot or cold it doesn't matter. Cycling the key a few times makes no differnce.
Some backround on the car. I bought the car with a blown motor. PO thought it was a bad opti (it was bad too), but it had a rod knock. I rebuilt the motor to stock specs, with the exception of using some forged pistions. Got the motor back in, went to fire it for the first time and was having some trouble. Turned out to be our fault (coil/icm was unpluged). It would need to crank several times before actually starting. We later found the coolant sensor in the water pump had been broken, replaced that and still the same problem. It seemed like it wasn't getting fuel. Did a presure test, was bleeding off real fast. Put a new pump (old one had hole in the plastic line inside the tank), filter, and regulator. Still same problem.
Scaning it gave the code for mass air flow failure. Bought a used one off a member on here and still have the same problem. If I start it and pull the maf out of the air stream the car will die (does this with either one). I haven't tried starting it with it unpluged though. The other codes were for the coolant sensor and the egr not being hooked up.
Car is basicly stock. It has a K&N cai, the air and egr deleted (not tuned for it though). It runs good when it is running. I think it seems to run better when the motor is cold though. It runs in open loop all the time (fans constantly run).
Anyone have any ideas where to go with this? I think I rember reading of someone else having the same problem...but it's been awhile and I haven't been able to find the post in my searching.
Some backround on the car. I bought the car with a blown motor. PO thought it was a bad opti (it was bad too), but it had a rod knock. I rebuilt the motor to stock specs, with the exception of using some forged pistions. Got the motor back in, went to fire it for the first time and was having some trouble. Turned out to be our fault (coil/icm was unpluged). It would need to crank several times before actually starting. We later found the coolant sensor in the water pump had been broken, replaced that and still the same problem. It seemed like it wasn't getting fuel. Did a presure test, was bleeding off real fast. Put a new pump (old one had hole in the plastic line inside the tank), filter, and regulator. Still same problem.
Scaning it gave the code for mass air flow failure. Bought a used one off a member on here and still have the same problem. If I start it and pull the maf out of the air stream the car will die (does this with either one). I haven't tried starting it with it unpluged though. The other codes were for the coolant sensor and the egr not being hooked up.
Car is basicly stock. It has a K&N cai, the air and egr deleted (not tuned for it though). It runs good when it is running. I think it seems to run better when the motor is cold though. It runs in open loop all the time (fans constantly run).
Anyone have any ideas where to go with this? I think I rember reading of someone else having the same problem...but it's been awhile and I haven't been able to find the post in my searching.
Thread Starter
Staging Lane
Joined: Dec 2009
Posts: 90
Likes: 0
Forgot to add, whenever I put gas in it, upon removing the cap I get alot of presure. I've tried driving around with the cap loose and it makes no differance. I have no idea if the how the car ran before I got it. The seller wasn't exactly honest about everything on it, so I'm not putting to much faith into anything he had told me.
Thread Starter
Staging Lane
Joined: Dec 2009
Posts: 90
Likes: 0
Starter is fine...it rolls over with no troubles. It's the actuall getting it to start that is the problem. I was thinking that the injectors could be bleeding down, causing it to flood itself until it gets some fresh air/fuel into the intake.
