TNScrambler
NAXJA Forum User
- Location
- Knoxville, TN
'88 Wagoneer Limited, 4.0
When the motor is cold it will crank all day, but never start....a small shot of either and its running. However when it runs it runs very rich.....as in it smokes a little.....a little like a freight train Seems to have a miss at idle and throughout the lower rpm range, when reving above around 2500 to 3000 it seems to clear out.
Today, we tested all the sensors, all checked out ok and within specs except the TPS....there are two connectors going to the sensor, on the one that is flat 3 pin connector we had 5 volts and good ground going in, and the proper specs coming out, however on the 3 pin square style connector we did not have 5 volts in, we checked and had conntinuity from the pin to the ECM connector, but still no input....we ran a jumper wire from the flat connector to get the 5 volts in and ran a jumper wire for the ground just to make sure it was good, and tested within specs, but when motor running it did not make a difference.
Then we checked and the no. 1 and no. 2 injector plugs were switched, so we put those back to correct and it seems to run a little better, but no where near good.
The ECU seems to be a replacement and fairly new, however it is not mounted down in the body, just laying on the console under the dash, I know these things are very ground sensitive, could that be an issue?
Any help would be greatly appriciated.
Thanks,
Justin
When the motor is cold it will crank all day, but never start....a small shot of either and its running. However when it runs it runs very rich.....as in it smokes a little.....a little like a freight train Seems to have a miss at idle and throughout the lower rpm range, when reving above around 2500 to 3000 it seems to clear out.
Today, we tested all the sensors, all checked out ok and within specs except the TPS....there are two connectors going to the sensor, on the one that is flat 3 pin connector we had 5 volts and good ground going in, and the proper specs coming out, however on the 3 pin square style connector we did not have 5 volts in, we checked and had conntinuity from the pin to the ECM connector, but still no input....we ran a jumper wire from the flat connector to get the 5 volts in and ran a jumper wire for the ground just to make sure it was good, and tested within specs, but when motor running it did not make a difference.
Then we checked and the no. 1 and no. 2 injector plugs were switched, so we put those back to correct and it seems to run a little better, but no where near good.
The ECU seems to be a replacement and fairly new, however it is not mounted down in the body, just laying on the console under the dash, I know these things are very ground sensitive, could that be an issue?
Any help would be greatly appriciated.
Thanks,
Justin