Car stops running when hot
08-11-2007, 04:42 PM
#1
3rd Gear Member
Thread Starter
Join Date: May 2007
Location: OH
Posts: 564
Car stops running when hot
I have a 91 5.0L. I just had it rebuilt and got it started for the first time today. I removed all of the emissions (EGR, TAD, TAB, and the canister purge valve).
The car ran great when I first started it up. Then I had a real high idle issue, that I finally got resolved. But now I have a new issue.
When I first start it up, the idle bounces up and down about 700rpm. It will eventually smooth out and run good. Then, after about 5 minutes, the idle will start freaking out again, and then the car will die. WHen it dies, it is next to impossible to restart. I tested the TPS, which I dont think is 100% correct, but a new one gave me the same resluts so I took it back. I have also replaced the ignition control module.
Anyone have any ideas what could be going on?
The car ran great when I first started it up. Then I had a real high idle issue, that I finally got resolved. But now I have a new issue.
When I first start it up, the idle bounces up and down about 700rpm. It will eventually smooth out and run good. Then, after about 5 minutes, the idle will start freaking out again, and then the car will die. WHen it dies, it is next to impossible to restart. I tested the TPS, which I dont think is 100% correct, but a new one gave me the same resluts so I took it back. I have also replaced the ignition control module.
Anyone have any ideas what could be going on?
08-11-2007, 05:00 PM
#2
5th Gear Member
Join Date: Oct 2005
Location: Ohio USA
Posts: 4,616
RE: Car stops running when hot
ORIGINAL: wolverine8490
I have a 91 5.0L. I just had it rebuilt and got it started for the first time today. I removed all of the emissions (EGR, TAD, TAB, and the canister purge valve).
The car ran great when I first started it up. Then I had a real high idle issue, that I finally got resolved. But now I have a new issue.
When I first start it up, the idle bounces up and down about 700rpm. It will eventually smooth out and run good. Then, after about 5 minutes, the idle will start freaking out again, and then the car will die. WHen it dies, it is next to impossible to restart. I tested the TPS, which I dont think is 100% correct, but a new one gave me the same resluts so I took it back. I have also replaced the ignition control module.
Anyone have any ideas what could be going on?
I have a 91 5.0L. I just had it rebuilt and got it started for the first time today. I removed all of the emissions (EGR, TAD, TAB, and the canister purge valve).
The car ran great when I first started it up. Then I had a real high idle issue, that I finally got resolved. But now I have a new issue.
When I first start it up, the idle bounces up and down about 700rpm. It will eventually smooth out and run good. Then, after about 5 minutes, the idle will start freaking out again, and then the car will die. WHen it dies, it is next to impossible to restart. I tested the TPS, which I dont think is 100% correct, but a new one gave me the same resluts so I took it back. I have also replaced the ignition control module.
Anyone have any ideas what could be going on?
Tps voltage .99 at idle KEY ON ENGINE OFF
08-11-2007, 05:20 PM
#3
3rd Gear Member
Thread Starter
Join Date: May 2007
Location: OH
Posts: 564
RE: Car stops running when hot
Yeah, I yanked all of the vaccum lines off, and pluggeg their source. I just ran the diag test, and got the following results.
22 X X X MAP/BP sensor out of self test range.
35 X X PFE or EVP circuit above the maximum limit of 4.81 volts.
X PFE or EVP circuit has intermittently failed above the maximum limit of 4.81 volts.
51 X X ECT sensor signal is greater than the Self-Test maximum of 4.6 volts.
52 X X X Power steering pressure switch always open or closed.
54 X X ACT sensor signal is greater than the Self-Test maximum of 4.6 volts.
67 X X Neutral safety circuit failure.
X A/C circuit was on during KOER Self-Test.
85 X X Canister Purge Solenoid circuit failure.
53 X TPS circuit above maximum 4.5 volts.
X TPS circuit has intermittently failed above maximum 4.5 volts.
25 X Knock not sensed during dynamic test.
So I am now thinking I have some mystery wiring issue somewhere, since the BAP, ACT, TPS, and the EGR are all connected.
22 X X X MAP/BP sensor out of self test range.
35 X X PFE or EVP circuit above the maximum limit of 4.81 volts.
X PFE or EVP circuit has intermittently failed above the maximum limit of 4.81 volts.
51 X X ECT sensor signal is greater than the Self-Test maximum of 4.6 volts.
52 X X X Power steering pressure switch always open or closed.
54 X X ACT sensor signal is greater than the Self-Test maximum of 4.6 volts.
67 X X Neutral safety circuit failure.
X A/C circuit was on during KOER Self-Test.
85 X X Canister Purge Solenoid circuit failure.
53 X TPS circuit above maximum 4.5 volts.
X TPS circuit has intermittently failed above maximum 4.5 volts.
25 X Knock not sensed during dynamic test.
So I am now thinking I have some mystery wiring issue somewhere, since the BAP, ACT, TPS, and the EGR are all connected.
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