1997 Ford Explorer

REDNECKREJECT

MEMBER
1997 FORD EXPLORER
6 CYL
2WD
AUTOMATIC
70,000 MILES

I just replaced the motor and had to put the old motor wire harness on it (the one on the new motor didnt start with the key and the transmission didnt work I dove it about 15 miles to a tranmission shop and back manuly it ran bad to see if it was the tranmission it wasn't it was the motor wire harness ) it starts up but after it warms up it runs really ruff I hooked it up to a computer and it said the 02 sensers were bad I took them out and cleaned them and replaced only one (cause it was beat up looking) any ways the motor runs like crap when you but it in reverse and idles down and shakes bad there is all kinds of pinging noises when I put it in drive I have my foot all the way down and it doesnt have the get up and go it just struggles to pick up speed and goes to around 4500 to 5000 RBM before shifting out of 1st gear the other gears are not as bad but still not good I have spent to much money on it and need to know if getting new 02 sensers will fix this problem please help thanx

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

First, the O2 sensor should be replaced of it is in bad condition and you are getting a code for it.

As far as the engine running, have you checked for vacuum leaks? Is the engine a direct fit (same year make and model)? Did your old wiring harness fit properly or are there extra wires? Is there any black smoke from the exhaust? Did you switch your old engine sensors on to the new engine? If the engine is a different year, did you replace the injectors with your old ones?

Let me know. It could be many things.

Joe