driving along doodahh doodahh go to step on the gas to get around this truck an bam nothing...no power from the motor just kinda bogs out an doesn't want to go.buuut the weird thing is if i match the gas pedal to my rpm's an slowly press the gas down as im going faster and faster it runs fine...i dont get it.any answers?

 

if clutch were slipping the rpm would go high,,,,,,,,
any codes ?? chk fuel pressure, ..

 

no CEL but then again i had my ecu chiped so i dont know it might be throwing a code but the chip is interfering

 

anyone?

 

A chipped ECU shouldn't prevent the ECU from throwing codes, but I am not sure about that. You may want to contact the manufacturer of the chip to verify.

Does the check engine light turn on for about two seconds when you first turn the key to the II position?

Are the maintenance items up to date, like spark plugs, dist. cap, and dist. rotor?

 

i pulled the cap an it looks good.and yes the CEL comes on for a couple seconds and then turns off.brand new ngk's so plugs are good...it feels like a fuel system problem but im trying to pin point it before i replace injectors/fuel pump.iv already replaced the fuel filter an it was full of all sorts of goodies for all i know the entire full system is full of junk.this car sat for a few years before i bought it off my brother.

 

yes i need to check the fuel pressure also

 

also it doesn't do it when im parked. only while im moving and only after it warms up.