TravisR351

edit.. need help! where do i start

TravisR351

scratch that got the codes i think ok they are as follows...21-ECT out of ranger, 24-IAT out of range, 34-EGR did not respond(kinda figured that much), 56-MAF High, 63-TPS signal low. Any Ideas obviously this is an airflow problem what is causing it?

Just call me Sean

iTrader: (1)

21= ECT out of range, the truck wasn't warmed up.
24=ACT out of range, the truck wasn't warmed up.
34= EVP voltage above closed limit, the EGR may be stuck open.
56= VAF or MAF circuit above maximum voltage OR TOT sensor, what year truck, what engine, what transmission?
63= TPS curcuit below minimum voltage, check the TPS voltage.

TravisR351

its actually a 90 model whoops ok I-6 and auto trans

TravisR351

and what the truck is doing it will start sometimes first try other days it turns over and over and over it will idle fine when it gets warm but if you rev it up it just starts popping back it will not take gas if you are trying to drive it just falls flat on its face

Just call me Sean

iTrader: (1)

Do a fuel pressure check.

TravisR351

seems to have good fuel pressure tried that

Just call me Sean

iTrader: (1)

Did you do a static pressure test and running test?

TravisR351

nope dont have a guage just from the bleeder seems to be normal i really dont think this is a fuel issue because as long as i rev it slow it will rev fine its just when it a descent quick rev or regular take off

aliens8mycow

Is it missing on one cylinder? You can check by pulling one plug wire at a time to see if the idle changes. If one doesn't affect the idle, it's missing.

Is the timing set right?

Have you checked to see if the EGR moves when you rev the throttle?