Car bogs out after 12 minutes with check engine light
#1
Leaking FC
Thread Starter
Car bogs out after 12 minutes with check engine light
I have an a 89 vert. Car is completely stock. Was running good but now has some twilight zone stuff happening. Its an n/a manual.
so I drive the car on the highway going 70 and my check engine light comes on then the fc won't accelerate passed 70. Then I start losing power and the car becomes jerky. So I pull over turn car off. Check wat I can without tools and turn it back on. It runs good after that....for 12 minutes then it does it all over again. The idle is weird because it doesn't stay constant instead it fluctuates back and forth ffrom 1000-2000
so I drive the car on the highway going 70 and my check engine light comes on then the fc won't accelerate passed 70. Then I start losing power and the car becomes jerky. So I pull over turn car off. Check wat I can without tools and turn it back on. It runs good after that....for 12 minutes then it does it all over again. The idle is weird because it doesn't stay constant instead it fluctuates back and forth ffrom 1000-2000
#2
Leaking FC
Thread Starter
so I was 2 hours from home when this happened and every 12 minutes id have to put the car in neutral, turn it off then back on again. In between that I had no issues. The check engine was coming on randomly before when id take my foot off the gas and the slightest depression would turn it off. That problem occurred at random intervals and did not happen at all today
Last edited by Seamoan; 11-16-13 at 05:48 PM.
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#12
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I don't think he gets where the code will be displayed satch.
The check engine light will flash a pattern/multiple patterns, (series of short and long illuminations) write it down, check the link I gave you.
It isn't going to get more clear than that over the internet. Go do it and you'll see.
The check engine light will flash a pattern/multiple patterns, (series of short and long illuminations) write it down, check the link I gave you.
It isn't going to get more clear than that over the internet. Go do it and you'll see.
#14
Leaking FC
Thread Starter
I have error codes 27 and 12.
27 is the oil metering pump like satch said and 12 is something with the TPS. Should I replace these parts? Start premixing? I guess ill start looking for broken wires and connectors because both of these codes indicate electrical failure
27 is the oil metering pump like satch said and 12 is something with the TPS. Should I replace these parts? Start premixing? I guess ill start looking for broken wires and connectors because both of these codes indicate electrical failure
Last edited by Seamoan; 11-17-13 at 02:32 PM.
#15
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Before replacing parts, test them to see if they have actually failed. Nothing worse than finding out after waiting a week of waiting for a part that it wasn't the issue. The S5 OMP uses the signal from the full range TPS, so crack out the FSM (fuel/emissions section) and read up on how to test it.
#16
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with code 27, the car will go into limp home, and the only fix is to replace the pump, or have the ECU chipped
#18
Leaking FC
Thread Starter
I tested the tps and it tested out okay.
http://www.johnr.com/tps.html using this page. It registered 12v on one side. I used the test connector by the airbox. Tps is good
http://www.johnr.com/tps.html using this page. It registered 12v on one side. I used the test connector by the airbox. Tps is good
#20
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The full range wire to the TPS, Black/Green wire, should measure .8 volts at idle w/key to on and 4.3 volts at full throttle w/key to on. And of course the engine should be fully warmed and plug connected to the TPS.
You can drive w/o oil for a period of time w/o doing damage to the engine internals.
You can drive w/o oil for a period of time w/o doing damage to the engine internals.
Last edited by satch; 11-17-13 at 08:09 PM.
#21
Leaking FC
Thread Starter
Damn well I still haven't been able to test the Tps in the way you explained. But for planning ahead, if I have to replace this part I'm looking at one for 500 bucks, anyone have any experience getting a used one? I've noticed my CEL is almost fully manipulated
by the gas pedal.
by the gas pedal.
#24
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I would advise against an used mop. It will fail in the same way. It's just a matter of time. And yes, running premix is a bit of a pain. I would open the ecu and look at the power transistor that controls the stepper motor. I bet it's cooked.
#25
Leaking FC
Thread Starter
I gave up and took it to the shop. They tell me to replace the OMP now and fix the possible vacuum leaks before changing the tps. They didn't test the TPS though. I just gave them codes. The omp they have is used.
Last edited by Seamoan; 12-05-13 at 04:55 PM.