Well, three weeks ago I traded my stock exhaust manifolds for a pair of hooker headers. It took FOREVER but in the end I got it accomplished. Now I have hooked everything up properly, checked connection, and finally checked ECM codes. Everything is clear. So that should mean the car will run? Well...the motor fires and runs for 5 seconds then revs to 4,ooo RPM then cuts out. Why is this? Are there any engine error codes that can only be read when the car is running? Which ones??
I am honestly thinking about junking TPI, i dont want to but...
Thanks, ben

 

Resto,

Vacuum leak? IAC walking open?

Try disabling the EGR valve and unplugging the IAC just for grins.

 

Alright....just for grins I will do that I know where the IAC is, just in front of the throttle body but....where is this EGR I am hearing so much about? I am sure all vacuum passages are sealed, I will check the motor to body ground strap, then get back to you guys about the results.
Thanks...
Ben

 

The EGR Valve is on the intake manifold under the plenium, on the passenger side toward the rear. There should be a hose leading from it, toward where your Coil is, because under the coil (or in that area, depending if anyone moved it) you have the EGR control Solinoid. You should be able to get your hand to the EGR, but i don't think you can take it out without removing the plenium. From my experience.. i've found that you can put your hand under the valve, and see if its stuck in the up position, and if its down.. you can apply some vaccum to it and see if it goes up. If its down with no vaccum, and up with vaccum, then the valve is ok. The next thing is the solinoid. I think solinoid would set off a code, but some times they slip by.

Hope that helps a bit,

Joker

 

To me it sounds like a sensor prob. maybe something not getting signal from sensor being unplugged. MAF? Are you using a scanner or code reader. Where at in IA? I maybe way off but hard to guess over computer.

 

Resto,

As for the error codes, once a code is set it remains in memory for the next 50 engine start cycles. Because of this, any code can be read with the engine off. there are parameters that can be displayed with the engine running, but you'd need a data logging scanner to do that.

Your EGR valve is nearly inaccesible with the plenum on. One way to disable it is to remove and plug the vacuum line at the EGR solenoid valve, near the distributor.