Recent content by n01tk

Warmed engine up and waited for it to go into closed loop. Ensured IAC was fully closed and unplugged IAC connector. With truck in gear, brake applied, adjusted idle to 550 rpm. Shut truck down, plugged IAC back in and done the IAC reset ( for my year of truck), 10 sec with key on position, 10...

Picked up the used ECM from salvage yard. No time to install. Truck seems to be starting quicker since I done the low idle adjustment procedure. Will keep you informed. Busy at job.

Removed IAC from TBI. Plugged port and started truck. Increased throttle, IAC pintle moved out, decreased throttle and pintle moves in. IAC appears to be working. Reinstalled in TB. Started truck. Removed PCV vacuum line, RPM initially increased but came back to near normal. Reinstalled line...

I tested the IAC input with a noid light. The noid light flashes with engine running. Lights turning red and green if throttle is varied. Noid light does not flash when key is turned to on position. Also no flashes when key is turned to off position. Noid lights stay lit but don't flash either...

Thanks for the reply. I have connected to the ECM with the TunerPro 5 software. The CTS shows ambient temp before starting ( after sitting over night) and follows the gauge temp up to operating temp. Goes into to closed loop. Seems to run very smoothly with a steady 20" of vac. The IAC wiring or...

Engine cranks 5 - 6 times when cold. If IAC electrically disconnected starts with 1/4 turn hot or cold. This engine has a rebuilt TB and new IAC motor. What could be the problem? Checked for vacuum leaks, can't find any. Vacuum measured when running, 20 "hg and steady. Any ideas?:???:

Your right, the TBI gaskets are noted for leaking but I just installed a rebuilt TBI and new gasket 3 months ago. The rebuilt unit ($410) came with 2 gaskets, I installed the one which appeared to fit best ( why 2 gaskets). I did take some propane and went all the way around the base, no change...

Built the smoke generator, could not find any vacuum leaks. Smoke white in color and hard to see. Measured cranking vacuum. 2" hg. This is low. Everything I read says 3 t0 5" when cranking. Drawing in air some where? Running vacuum is 15" hg momemtarly than it slowly moves up to 20 "hg ( 15...

Great, makes sense. I am now building a smoke generator to find any small vacuum leaks. Let you know how well it works. http://www.fiero.nl/forum/Forum1/HTML/081547.html

Don't understand what adaptive means in this instance. Does the ECM go from a bias and start counting?

Decided to buy a can of quick start. Let vechilce sit for 24 hrs and sprayed quick start down throat of TBI. The truck turned over about one turn and fired up. Halleluiah, progress. Should have done this sooner. Pinched off vacuum line going to vapour recovery canister. Turned truck over and...

I will check for a knock module in behind the distributor post ( hard to see ). Warwagon what would I connect to with scope. I tried using a scope ( Fluke scopemeter) to look at the injector pulses but got garbage. Not sure if I should be using a signal for external syn. or something else I am...

I believe my engine does have the knock sensor ( just in front of starter with one wire going to it?) How do I check the knock sensor? I have set my timing at zero with the jumper unplugged, the timing is good. Thanks for the reply.

Hey thanks for the reply. All good points. I do hear the fuel pump run when the key is turned to the on position. The fuel press comes up to 11 psi and stays there while cranking. I monitored the voltage right at the fuel pump while cranking and I get ~ 11.5 vdc, battery voltage ( new battery)...

My C3500 will not lite up quickly after sitting ( 24hrs). I installed a new fuel filter, pump, lines and TBI ( rebuilt) This truck has the long fuel pump run time (~20 secs) to ensure vapour lock doesn't occur. I installed a fuel pressure gauge and get 11 psi ( gauge cal. checked). The gauge...