Car runs for 2 secs & shuts down
12-31-2008, 08:24 PM
#1
Car runs for 2 secs & shuts down Here's the run down, I just turbo'd my car, swapped to a HPT 3 bar OS, installed Seimens Deka 55# low Z injectors, installed acceleronics versa fueler injector driver, new TR6 plugs, & FAST 3 bar MAP & adapter harness. I had Bill @ HPT look at the tune and I trust him implictly, he said the tune seems to be all in order. Now I'm starting to look at my PCM, the injector driver, and maybe the oil level sensor in the pan. Sometimes the car will run for a little longer but if I step on the accelerator at all it dies. I have been pullingmy hair out trying to figure this out and come up empty handed. Anyone deal with this problem before, or can point me in the right direction?
12-31-2008, 08:29 PM
#2
i had a problem similar and hose in the fuel tank going to the pump kept blowing off. its unlikely unless youve been fooling with it. but if you have a access hatch wouldnt hurt to take a peak.
12-31-2008, 08:35 PM
#3
Installed a dynotune digital fuel pressure guage for the turbo, fuel pressure was in the 60# range the whole time. Even when it died the fuel pressure was right at 50psi. Thank you though for the suggestion, I need all the input I can get right now.
12-31-2008, 08:47 PM
#4
yea figured it was a long shot but thats what happend to me. it would run fine then die suddenly when you touched gas petal....good luck its always a PITA trying to find a problem.
12-31-2008, 08:49 PM
#5
12 Second Club
iTrader: (8)
Join Date: Nov 2004
Location: Royal Oak, MI
Posts: 205
Likes: 0
Received 0 Likes
on
0 Posts
Could be a VATS problem maybe? If it is still enabled in your tune it will shut off the injectors after 2 seconds if it doesn't get the right value from the chip in your key.
12-31-2008, 08:52 PM
#6
I think I may have figured it out, I made a log and the map sensor is supposed to read about 100 KPA with the key on and engine not running, mine reads o. Now I just need someone to back my theory up and try to test the map sensor in some way.
12-31-2008, 08:59 PM
#7
My big thing is the MAP reading now. With the key on & engine NOT running it should read 14.5psi = 100KPA, mine reads 0 psi until I try to crank it & then it goes 4 psi and stays there (i guess because there is still vaccum in the system).
I need to know how to test the map sensor so I can rule it out or get a new one.
Trending Topics
12-31-2008, 11:53 PM
#11
I asked Bill about this and he said it could be possible but very unlikley. And since then I have gotten it to run for about 10 seconds.
My big thing is the MAP reading now. With the key on & engine NOT running it should read 14.5psi = 100KPA, mine reads 0 psi until I try to crank it & then it goes 4 psi and stays there (i guess because there is still vaccum in the system).
I need to know how to test the map sensor so I can rule it out or get a new one.
My big thing is the MAP reading now. With the key on & engine NOT running it should read 14.5psi = 100KPA, mine reads 0 psi until I try to crank it & then it goes 4 psi and stays there (i guess because there is still vaccum in the system).
I need to know how to test the map sensor so I can rule it out or get a new one.
I saw "Bill@..." and I skipped right over the HPT just thinking it was a local shop or something.
01-01-2009, 01:10 AM
#12
7 Second Club
Join Date: Jan 2007
Location: Sydney
Posts: 259
Likes: 0
Received 0 Likes
on
0 Posts
my 3 bar used to read 0 until i started the car then it read correctly, i was using a normal GM 3 bar sensor..
i would say it is a vats problem, just disable it in the tune and see if the problem goes away
i would say it is a vats problem, just disable it in the tune and see if the problem goes away
01-01-2009, 10:19 AM
#15
Thanks everyone for the replies, I havent turned VATS off or relinked it yet. I know its unlikely that it could be stopping the car from running but I'll try anything at this point.
I also decided that my problem may lie in the injector driver so I e-mailed tech @ acceleronics and this is what they had to say.
Usually when I have a problem like this its something I have done wrong, all I have to do is talk to Bill from HPT & he steps in and saves the day. I wish this was one of those times
I also decided that my problem may lie in the injector driver so I e-mailed tech @ acceleronics and this is what they had to say.
The VersaFueler is very easy to troubleshoot because it either works perfectly, or not at all. The ECM still controls injector pulsewidths, all the box does is convert the ECU signal into the type that can drive low impedance injectors. If the box had failed, the affected cylinders would never get any fuel.
It sounds to me as though you have either a MAF problem or a VATS problem. The fact that the engine starts with the VersaFueler means that the box is working. I had another customer chasing the same symptoms – his ended up being a problem with the ignition key.
Jeff
It sounds to me as though you have either a MAF problem or a VATS problem. The fact that the engine starts with the VersaFueler means that the box is working. I had another customer chasing the same symptoms – his ended up being a problem with the ignition key.
Jeff
01-01-2009, 10:49 AM
#20