mhay Posted June 28, 2010 Share Posted June 28, 2010 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. Link to comment Share on other sites More sharing options...
adamzan Posted June 28, 2010 Share Posted June 28, 2010 Sounds like something injector related. When was the last time a tune up was done though? Link to comment Share on other sites More sharing options...
mhay Posted June 28, 2010 Author Share Posted June 28, 2010 tune up was about 25000 ago by previous owner. Have the reciept for it and everything was done including timing belt and water pump. Link to comment Share on other sites More sharing options...
rocknforchrist Posted June 29, 2010 Share Posted June 29, 2010 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. Link to comment Share on other sites More sharing options...
mhay Posted June 29, 2010 Author Share Posted June 29, 2010 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? Link to comment Share on other sites More sharing options...
nismothunder Posted June 29, 2010 Share Posted June 29, 2010 What did the oily mixture look like?could be intake gasket. Link to comment Share on other sites More sharing options...
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