Strange starting problem

[i'm boosted]

Hi All,

I have a strange problem. I was coming home from work a few nights ago and pulled in to the driveway and turned the car off. I have a Greddy turbo timer that actually shut the car down. I come out the next morning and the car would not start. It acts like it want to start, but just can't stay running. First thing I check was the timing belt. It's snug. Then I checked compression. 150 across the board. Two weeks before this problem I installed a walbro 255 fuel pump and magnacore wires. I put my stock wires and fuel pump back on...same result. I checked for spark and it was very weak and at times there was no spark coming from the plugs at all. So I replaced the coil pack and the power tr with the same result. I was reading some past post last night and one of the members suggested to someone to unplug the MAS and see if it will start. I ran out side and tried that and the car fired up. But when i gave it gas it stalled. Turned the key and the car continued to start up. So I decided today to buy a new MAS. Before going to the auto parts store, I decided to start it again and the car would not start with the MAS unplugged or plugged up. I was like !!!! So I did not buy the MAS figured it was a fluke. Later in the evening I came out side to start it, the MAS was un-plugged...same result. But after a couple a attempts the car started and idled perfectly. This time I let the car warm up first before pressing the accelerator...the car did not stall this time. I plugged the MAS back and the would not start. So the MAS must be bad, but is there another problem since I had to let the car completely warm up before I was able to press the gas pedal without the car stalling. I know this is long but I wanted to put everything out there. Any help would be greatly appreciated.

 

[bunkmonkey]

I have not tried to start it w/o the MAS plugged in, but I am having a strange starting problem also. How long do you try to turn your car over before giving up? Have you checked your TPS and temp sensor? My car turns over w/o catching for awhile before it tries to start and then stops...if I keep trying eventually it will start and die, start and die, and then it will start and I have to give it gas, but sometimes the gas makes it die...eventually though...if I am persistant...it runs alright and I can drive it normal. When I took it to my mechanic he suggested replacing the TPS. I might not have the same problemas you, but in trying to figure it out I read about the temp sensor in my Chilton guide. There is more than one, I can't remember the word that goes before temp...anyway, you might look into something like that. It sets the default temp of your engine to a certain degrees and if it really isn't that temperature outside, you have to warm your car up before it works correctly.
Probably doesn't help at all...
-Carol

 

[i'm boosted]

I replaced my MAS with the same result. My problem is exactly like yours. I had to crank it for like 10mins and then it will fires up then dies. Give it gas and it acts like it wants to die out quicker. I will check the temp sensor. I think it's called the coolant temp sensor. Thanks

Brian

 

[92awddsm]

Mine did that and it was the ecu. Caps were leaking and caused all sorts of crap to happen. Pull the ecu and see if the internals are ok.

 

[i'm boosted]

I pulled the ECU out this morning, and the board is clean on both sides. no sign of cap leakage. If I can track down a good ECU for cheap I will give it a try too. Thanks.

 

[i'm boosted]

I replaced the coolant temp sensor, i am in the same boat. The only thing left is the CAS, and the ECU. My ECU does not have a smell and the caps are not leaking. I am in the process of tracking down a known good ECU that I can swap in. If anyone knows of anything else I can try I am all ears.