98 Ranger 4.0

[tobyduck]

Okay...so I had a huge project. I replaced the engine in a 98 ranger with the engine out of a 94 explorer. The mileage isn't high and there isn't a big difference between the two. I bought the truck from someone who had blown the head-gaskets and filled the radiator with stop leak or whatever, anyways, it stopped up the heads. I don't even know about the block, but it is just damaged goods...it damaged the engine pretty severely. It also had blow-by. I got a hold of the engine out of an explorer and there aren't any leaks of any kind. The only difference was the piece that recognizes what the firing order is, I can't think of the name of the part. Anyways, everything is installed correctly but when you plug up the maf sensor, it idles very low and shuts off. I know that the only use for this sensor is to make the truck more fuel efficient and can be bypassed. I would like to have everything original but I don't have a clue what the problem is..I just know that it worked before we swapped the engines out. I have already replaced the part and still get the same response, it maybe the wiring but I don't know what to check for or what to ohm out.

 

[tobyduck]

it was caused by a slipping belt. not sure how that ties in, i plugged up the sensor and it worked. I still don't know what the problem was but I'm glad it is fixed

 

[Yellowsplash]

You need the Maf sensor. The ecu doesnt know how much air is entering the engine without it.