I just put a new long block into my truck. It ran fine for a little then when driving down the road it felt like the clutch was slipping or something was catching. i went and checked the brakes hubs didn't find anything then i checked all the vacuum lines and electrical connections all are good then i decided to replace the spark plugs and distributor cap it solved the problem for a little but now the problem is back.

 

i checked all the vacuum lines and electrical connections all are good then i decided to replace the spark plugs and distributor cap it solved the problem for a little but now the problem is back.

did you replace the rotor? verify timing with the jump wire?

 

yes i replaced the rotor and checked the timing i went out tonight and took out the spark plugs and the plug closest to the cab was fouled i think that would be the problem now a question would be why is it fouling the plug i just replaced them three weeks ago.

 

are they NIPPON DENSO?

 

or NGK?

 

the plugs are nkg now they were denso

 

How is it running now?

 

it is running fine now so the plugs being fouled was the problem now have to fine out why there getting fouled its the third set that's be in there in there since august it fouls the back plug i take it out and it covered in burnt oil. so now i have to find out whats causing that problem don't understand cause its a new block just put in in august

 

re-torque your rear well all your head bolts to make sure they are at spec.

 

the new block, in my truck, doesn't run well ....

 

Is it a brand new long block or a rebuild? Did the long block come with a warranty/guarantee?

 

it was a rebuilt long block with a guarantee and the head bolts needed torqued down again