NiteRida
07-17-2008, 12:06 AM
My car is currently “track only”. The current engine has been in the car since 2002. It sits for a while between uses (up to 2 months or more at a time). The only way I was able start after sitting in April and then this past weekend is a “shot” of starting fluid. Once it does start it runs like crap (i.e. rough). This is a new problem that I’ve never previously experienced. Prior to April it's always started right up.
I installed a new converter in April and finally go it started to get the fluid level check. Didn't try it again until this past Sunday. On Sunday I decided to go to the track and again it wouldn’t start. Shot of starting fluid and it finally fired. Without the starting fluid it would just turnover and stumble every now and then like it wanted to fire.
Here's what I've done to date to troubleshoot:
*Snap-on diagnostic tool did not show any codes.
*Fuel pump is a Aeromotive A-1000 and maintains the set fuel pressure under a load (WOT).
*Changed the filter before and after the pump in December 2007.
*I pulled the Accel coil and put on the stock coil. Still wouln't start.
*I bypassed the 6AL (while stock coil was on) and still wouldn't start.
*Pulled the chip out of the EEC computer, still wouldn't start.
*Pulled a spark plug and layed it on a grounded metal surface and had a nice blue spark - wanted to confirm I had a spark.
*While cranking, the fuel pump is running and maintaining the set fuel pressure. I used the factory fuel pump relay trigger wire as the trigger wire for the Aeormotive pump relay.
*Installed brand new MSD plug wires. My FRPP had high resistance (some were REAL bad). Still wouldn't start.
*cleaned all the terminals on the cap/rotor. Still wouldn't start
*re-base lined the TPS and set it. (0.995 volts at 0.010" gap, then idle screw turned in 1.5 x's). This is how I've always set the base line and it's been perfect.
*checked the injector harness with a "Noid". It's a light you plug into the injector harness. If it lights up, then the injector is receiving voltage. Still won't start..
*installed new plugs... still won't start
Shoot some staring fluid in it....... Ta-Da... it fires up and runs. Not smooth, but will run.
I've got spark, timing is correct, compression, fuel pressure, injectors are getting the signal from the computer....
I’m thinking that it’s the injectors. I bought them back in 1994. So, they are 14 years old and do a lot of sitting around. Probably have less then 1000 miles on them. They are the dark blue topped 36 lb/hr.
The only thing that’s changed since I’ve had this issue is a converter swap. Nothing was touched with computer, ignition, etc.
Any other thing I should check before getting new injectors? Thoughts?
Thanks.
Jon.
I installed a new converter in April and finally go it started to get the fluid level check. Didn't try it again until this past Sunday. On Sunday I decided to go to the track and again it wouldn’t start. Shot of starting fluid and it finally fired. Without the starting fluid it would just turnover and stumble every now and then like it wanted to fire.
Here's what I've done to date to troubleshoot:
*Snap-on diagnostic tool did not show any codes.
*Fuel pump is a Aeromotive A-1000 and maintains the set fuel pressure under a load (WOT).
*Changed the filter before and after the pump in December 2007.
*I pulled the Accel coil and put on the stock coil. Still wouln't start.
*I bypassed the 6AL (while stock coil was on) and still wouldn't start.
*Pulled the chip out of the EEC computer, still wouldn't start.
*Pulled a spark plug and layed it on a grounded metal surface and had a nice blue spark - wanted to confirm I had a spark.
*While cranking, the fuel pump is running and maintaining the set fuel pressure. I used the factory fuel pump relay trigger wire as the trigger wire for the Aeormotive pump relay.
*Installed brand new MSD plug wires. My FRPP had high resistance (some were REAL bad). Still wouldn't start.
*cleaned all the terminals on the cap/rotor. Still wouldn't start
*re-base lined the TPS and set it. (0.995 volts at 0.010" gap, then idle screw turned in 1.5 x's). This is how I've always set the base line and it's been perfect.
*checked the injector harness with a "Noid". It's a light you plug into the injector harness. If it lights up, then the injector is receiving voltage. Still won't start..
*installed new plugs... still won't start
Shoot some staring fluid in it....... Ta-Da... it fires up and runs. Not smooth, but will run.
I've got spark, timing is correct, compression, fuel pressure, injectors are getting the signal from the computer....
I’m thinking that it’s the injectors. I bought them back in 1994. So, they are 14 years old and do a lot of sitting around. Probably have less then 1000 miles on them. They are the dark blue topped 36 lb/hr.
The only thing that’s changed since I’ve had this issue is a converter swap. Nothing was touched with computer, ignition, etc.
Any other thing I should check before getting new injectors? Thoughts?
Thanks.
Jon.