mectra

I have 93 that basically had nothing left in the engine compartment. 2.5 years later, everything is together with the single turbo modification. I started the car with the original ECU because I didn't have the Power FC yet. It started and ran, pretty rough, but it ran. The FC arrived, I installed, it started as before; I had it running for a while, but not very long. The next time I tried to start it, it would not run. It acts like it's going to fire up, but does nothing. It has good compression, spark, I've checked and rechecked the hoses and wiring. I swapped out the FC for the old ECU. Same problem. The weird thing is, I can get it running with the map sensor unplugged. I've been trying to figure this out for over a week now. I've checked all over the forum, and haven't found anything yet that has helped. Saw something similar with a couple 2nd gens, and they were push starting to get it going. Any suggestions, ideas would be very helpful, because I'm feeling hopeless that I'll ever be road worthy.

zmarko

It could be flooded if it was started and only ran for a little while with out being driven. There are ways to fix that. Just gotta search.

mgoddard1

I'd check to see if your TPS is set correctly and with the PFC commander you can see what it's reading on the monitor screen as you push the gas pedal. If your motor is flooded then do this:

Bruce Terrentine's severe flooding fix:

1) pull the egi fuse to disable the fuel injectors
2) remove the leading plugs and crank the engine over for about 20 seconds to get rid of excess gasoline.
3) put about a tablespoon of ATF (automatic transmission fluid) in each of the spark plug holes and put the plugs back in. ATF will restore compression lost by the gasoline washing the oil away and it will remove carbon deposits.
4) crank the car for about 20 seconds
5) remove the plugs and crank the car for another 20 seconds.
6) Clean the plugs, reinstall them, put the egi fuse back in, and start it up. Expect massive amounts of white smoke as the ATF burns off.

mectra

Thanks for the input. I haven't checked the TPS on the Commander yet. I ohmed it, but that may not tell me what I need to know. Here's what I have done:
*checked fuel pressure because when gas is injected in the maniford in the primary area it will fire up briefly, then die. I blocked the return line, checked max pressure which was 93 lbs. normal pressure is 37 lbs.
*crack angle sensore wiring is okay. I've checked the continuity on all the wiring. I've jumped relays - all are working.
* There are no vacuum leaks.
*Compression check shows 90 lbs.
Here are some issues I'm not sure about: I removed the solenoid for the twin turbo - anything special need to be done with the left over wiring? Could the oil level float be shorted? Is there any kind of safety switch that activates to keep the engine from starting?

I am using the stock injectors, and they have been cleaned - would they cause the problem if they are stopped up or shorted somehow?

I've unflooded so many times now I can almost do it blindfolded.

mgoddard1

If you recently had your injectors cleaned then you obviously had them removed. The injector o-rings may be pinched or not seated correctly which will cause raw fuel to leak into the LIM. Remove the fuel rails from the LIM and block, pressurize the system, and see if they're leaking around the nozzles.
The oil float won't kill the engine, it's only connected to the idiot light on the oil pressure gauge.

If you still can't get it started and if you live in the Indianapolis area you might want to have these guys look at it:

http://www.aimtuning.com/

mectra

This evening I put a pulse light on the injector connectors. When I first crank it up the light blinks very bright initially, and as it cranks longer, the light flashes more and more dimly. On the commander, it shows 8.5 when I first start to crank, then goes down to 1.5. Is this something that is limiting the power to the injectors, which keeps the fuel from injecting enough gas to fire up? What would cause this?

Mike Nola

How long did the injectors sit around after getting cleaned? The injector cleaning services don't tell this to customers, but they do not flush out the cleaning fluid when they are done (i can't figure out why the hell not), so if the injectors sit around for a few months before they are installed and used, the cleaning fluid dries inside the injectors, and things no worky so good.