please help me

[jessefrew]

I bought an 86 ranger 2.3 4 wheel drive a while back and I changed the motor because the one it had in it lost compression on one of the cylinders. The new motor I put in it is also a 2.3 and it came out of a mustang. Now my truck surges when I'm driving down the road, almost like it isnt getting the right amount of gas while driving but it is fine at an idle. I have changed both fuel pumps and the tank, I even changed the high pressure pump twice because I had been told that there was the possibility that I bought one that was bad, so i took one of of an identical truck that ran perfect. Helped for a little bit til the truck gets warmed up and then it starts surging again. I cant drive it over 30 MPH because it just wont go. I have also changed the coil, it has new plugs and wires. Please help me, I am really close to giving up, I have put about 1000 bucks into this truck in just the last 3 weeks trying to make it run right and I just cant figure it out! I also read in another post that if the fuel pressure regulator is bad that it will have raw gas in the vacuum line and i checked that and it didnt have any. Any insight would help, thanks so much!

 

[shadetree]

That year Mustang did the engine come out of? shady

 

[BlackBII]

What all did you swap from the mustang into your truck?

 

[pedal2themetal45]

sounds like a carb prob ... lean or its plugged up..
Tim

 

[jessefrew]

What all did you swap from the mustang into your truck?

just the motor, nothing else.

 

[jessefrew]

That year Mustang did the engine come out of? shady

87 or 88 mustang i believe

 

[jessefrew]

i forgot to add that it is fuel injected too.

 

[Bonedriver]

Your timing belt may have jumped a tooth... ???

Did the mustang engine come out of a junkyard? It may be the reason it was there. My stang did that when I changed the belt... I jumped a tooth and it was gutless above ~34 MPH...

 

[jessefrew]

Ill check the timing again to be sure, i guess i didnt think about that much because i just put it on when i put the motor in and somebody else told me that if it jumped time then it wouldnt run at all. Anyway, the mustang didnt come from a junkyard, it actually was supposed to run great, another mechanic i know was taking it out so he could v8 it for a drag car or something like that. I wanted to hear it run but he already had the gas tank pulled out of it when i bought it and he said he would warranty it. I took it up to him when i first got it done because it wasnt running right and i wanted his opinion and he just said he didnt know what was wrong with it but he didnt think it was the motor itself. I did have to swap over the intakes when i swapped the motors. I put new gaskets on the motor i was putting in that way it was done while i already had the motor out. but anyway the intakes were different so i had to use the one off of my old motor. Thanks for all the suggestions....