Only running on 5 cylinders?

[mhay]

Hey guys, truck seems like its running on 5 cylinders. Read the codes and only got a 51(injector circuit). You guys know of any good ways to trouble shoot what is wrong? its a 93 auto btw. Thanks in Advance.

[adamzan]

Sounds like something injector related. When was the last time a tune up was done though?

[mhay]

tune up was about 25000 ago by previous owner. Have the reciept for it and everything was done including timing belt and water pump.

[rocknforchrist]

Yeah I got the same problem with mine. Cel code 51 and going up a hill doing 60 it has a hard time without shifting down. Might be a leaky injector. I haven't pressure tested mine yet but did a full tune up, plugs, wires,distributor cap and rotor, fuel filter. Didn't help but now I know it's not that.

[mhay]

Did a little investigating this morning. pulled the plug on the first passenger side cylinder and it was soaking wet with an oily mixture. so leaky injector more than likely? Also, should I be getting a misfire code along with the injector circuit code?

[nismothunder]

What did the oily mixture look like?could be intake gasket.