running poorly

[fastTa]

Sounds fuel related to me. Check your fuel pressure at the schrader valve. Check it with the key on engine off first, and pull off the vacuum line off the regulator while you are monitoring the FP gauge. Then check it with engine running but with the vacuum line back on the regulator. Fuel pressure should not be below 40 PSI on both counts.

Do you have a way to measure amperage draw? When a fuel pump starts going, it will draw more and more amperage. Most of the stock LT1 fuel pumps I have measured are right around 2.5-4 amps when healthy. They can go over 10 amps when they are going bad.

I'll agree that you need to get the car scanned. Just because the SES light is not on doesn't mean there aren't any codes.

[Jeff_in_Atl]

My car did the same thing a couple of years ago and as Joe said it was the EGR valve. It had enough carbon build up to hold it open just a little. The dealership took it off and cleaned it and the tube and it has run fine since.

[Joe 1320]

My car did the same thing a couple of years ago and as Joe said it was the EGR valve. It had enough carbon build up to hold it open just a little. The dealership took it off and cleaned it and the tube and it has run fine since.

Would ya know it, my T/A started acting up on the way to work. Probably because mine hasn't been driven in some time......... a little hesitation with light throttle application. Got an EGR code, reset it and it didn't trigger again...... yet.

[Atl_Monte]

I think you need to take a step back and look at this.....

How many miles? When were the plugs and wires changed? Optispark?
The entire ignition system was engineered for a 100K mile lifespan. Has any of the parts been changed? Many of out misfire problems come from the optispark distributer, coil, plugs and wires. If that is fresh and you still have misfire issues, then we can look at other things.

plugs changed about two months ago, wires changed last week, opti spark probably original

[Joe 1320]

plugs changed about two months ago, wires changed last week, opti spark probably original

I think you should do a systematic process of elimination. Check for consistant spark at every plug. If that isn't the problem, then look to injectors. If constant fuel at each injector, then look toward emission controls. Having a scanner could help you in that you can look at the sensor outputs and what the computer is reading/doing.

[Atl_Monte]

I think you should do a systematic process of elimination. Check for consistant spark at every plug. If that isn't the problem, then look to injectors. If constant fuel at each injector, then look toward emission controls. Having a scanner could help you in that you can look at the sensor outputs and what the computer is reading/doing.

are these things possible with the car no longer running?

[Iceslim0]

Your car quit running?

[Joe 1320]

are these things possible with the car no longer running?

If it will spin over via the starter, yes.

[Atl_Monte]

yea it will spin over, jsut wont start...will check to see if its firing today, and let you guys know...

[fastTa]

yea it will spin over, jsut wont start...will check to see if its firing today, and let you guys know...

You really need to get somewhere to get the car on a scanner. Then go from there looking for the basics like Joe said......fuel, spark, compression, good vacuum, and also look for any vacuum leaks.

[Jeff_in_Atl]

yea it will spin over, jsut wont start...will check to see if its firing today, and let you guys know...

Where abouts in Atlanta do you live? (The nearest town.)

[Atl_Monte]

Where abouts in Atlanta do you live? (The nearest town.)

just sent you a PM

[Jeff_in_Atl]

just sent you a PM

Reply sent.

[Atl_Monte]

starting to think its the timing chain, because I finally got the time to jack it up and check to see if it was firing its still firing, and the fuel pump is indeed working, and when you crank it ova you can hear it blowing back thru the intake...

[Atl_Monte]

what??no yay's or nay's...or opinions?