inline6power

ok my buddy francis212 put some new injectors in and now he has stated that if he goes 60 to 70 and goes WOT he hears a poping sound and the truck stutters. i told him to check the tubes and he said there is no fuel leaks or anything of that nature. asked him the procedure he took to change everything, and he did everything correctly. got any ideas on y its popping and stuttering. he also said he has a intercooler boot leak that he is taking care of but not sure if this could cause the problem. also said it only does this and WOT , not just cruisin around.

plow

sounds like timing.

Green04HO

What are the stats on the truck? If equipped with a CP3 Injection pump it sounds like he is running out of fuel. It could be the lift pump not suppling enough fuel to CP3 or CP3 pressure dropping off because of the increase in fuel from the new injectors.

This is commonly called "Bursting" by the Chevy crowd who also use a version of the CP3 we use in the Dodge trucks.

inline6power

these are his stats.

2001 5speed kn, edge comp, 4" down to 5" to 6" turn out stacks, southbend, fass fuel pump only, injectors, Autometer Fp, pryo, boost WANTED: AFE Cannon

he told me he thinks it may be his map sensor. but i have no clue.

RCW

If you have an air leak between the turbo and the intake horn, that will underpressurize the manifold and cause the MAP to cut down the fueling rate. The symptoms you describe are typical of that sort of problem.

DR3500

What model year? is it a third gen? if it is he is starving the CP3 of fuel.

inline6power

thanks for all the info guys. he figured out what it was, he acidently unplugged his map sensor

RowJ

I have occassionally noticed rapid popping, no studder, at WOT. Not real loud! Only hear it when exhaust bounces off an overpass sidewall or barrier of some kind. Is this the same? I fairly positive it's not my MAP sensor.

RJ