a time ago whe bought two pumps for 150.00 dollars for both!!!

they didnt rev up to hig rpm, we just changed the GSK for the ones we took out of our 160, and it reved up to 3800 empty...

 

Careful on stretching that spring there in the overflow, if your not carefull, you will stretch it to far!, its not ment to be stretched, and the exacts of the spring is to fine to be grabbing it and stretching it if you do not know what your doing. not quite sure on the specs of the spring length, but if you think its your overflow spring, get a new one!, your pump will thank you!

 

Number 1 cylinder is the one that is most dependent on internal injection pump head pressure. That being the case, I would look really closely at the overflow valve being the problem.

Number 1 is also the cylinder that is the least efficient and has the most shrouding around the valves, so slow timing will cause an intermittant miss anytime the engine is not really hot.

Lastly, if the first two are not your trouble sources pull the number 1 injector and do a compression test. Do a static test and a leak down test. It could be a bad headgasket.

Do not worry about that pump not supporting 400 horses. A dead P pump will outflow anything else ever offered by Cummins on this series of engine.

 

oh really? what does it cause? we stretched lots of springs already... worked out great! well... i got it from some other thread in TDR.

 

if you stretch the spring to far you will have a runaway, good luck shutting it down safely. i had alot of missing and white smoke when it was cold after i installed my injectors i bumped my timing up to 17.5* and now i have no missing at all even when it was 15 degrees outside tonight

 

Why was this post dragged up from the dead?

 

good point i never even looked at that, this thread was dead back in april.