thajuggla

Hey guys,

87 5.0 5spd, with MAF conversion.

I did the KOEO test and got these codes: 51 - 22 - 53 - 54 - 35 - 67 - 96, ive looked them up but have no idea about how to fix them.

I also did a KOER test, and I never got any codes from it at all. My light didnt flash at all, not even the fast blinks for the engine code test. The light was just constantly on. Im needin help guys, the car idles great when its at normal op temps. On a cold start I have to hold the pedal down for a few minutes or else it will shut down. Any ideas?

FivePointOhh

code 51, pop out the act sensor and try and clean it best as possible, may need to be replaced.

code 53 you need to et your TPS voltage, its above 1.01 volts.


code 67 either you had yoru AC on during koer test or nuetral safety switch failed or not plugged in.


code 96 i think is poor grounding to the fuel pump or something.

5.0stanger

you have an 87...they don't have a CEL wired up

thajuggla

actually my 87 does have a CEL. I didnt use that though to check for codes, I actually had some left over xmas lights that i cut and used =]

I think the problem may be the ACT sensor as I've read about others having the same problem as me throwing the same code. Will I be able to pull the sensor easily?

FivePointOhh

was my post invisible?

ACT is located on the driverside lower intake manifold screwed into the intake runner. looks like a spark plug kind of when you pull it out. make sure connections are clean and try cleaning the sensor and clear your codes to see if it throws it again. if it does most likely it'll need to be replaced.






just to make sure you are running codes at full operating temp correct?

thajuggla

No your post wasnt invisible, my 2nd 2 sentences were to you lol. I was asking if the ACT would be easy to pull, or will I have to remove upper intake to reach it?

Also, I was operating at 180 degrees for the test.

Joel5.0

Code 51 = Engine Coolant Temperature Circuit (ECT) Open (M,O)
Looks like either the coolant sensor is disconnected, or it's fubar. This code will also not allow the KOER self test to be initiated.

53 - Throttle Position Sensor Circuit Above Maximum Voltage (M,O)
1.01 vdc is not the threshold value for this code, you could have it read 1.19 vdc and this code shouldn't show. Looks like the TPS is also fubar or a short in the wiring is present. Disconnect TPS sensor, rerun KOEO and check if code 63 shows up instead. This hard failure code will also prevent a KOER self test from being initiated. LUK