hotrodford88

hey im pretty new to yotas. only had mine about 2 months. today it started idleing really rough and when you try to give it gas it bogs really bad and sometimes stalls. its so bad its not driveable. started by cleaning throttle body and checking dist cap rotor button and wires. all fine. after some more checking i figured out that it will run right as long as i spray carb cleaner through the MAF sensor. idk what the problem is. the truck is an 88 4x4 with a 22re and a 5speed with 145000 miles it has a cold air intake and an msd coil. its stock other than that. any help will be appreciated.

MATTSRED

Check the vacuum lines?

Gizler00

iTrader: (1)

Fuel pump. It's probably running off of the carb cleaner when you are spraying it in there. Try testing fuel pressure. And do the fuel pump test as stated in the FSM

hotrodford88

ok checked the vacum lines and all look good. replaced the fuel filter. and no change. if you very very slowly rev it it will take it and run up. but if you try to rev up other than really slowly it bogs really bad.
ill check feul pressure next.

hotrodford88

well think i figured it out. after Gizler00 said fuel pump i crossed fp to b+ at the diag connector and got under the truck and listened to the pump and it was rattling and sounded rough. did the car lot trick and slapped the tank with a hammer a few times and now its running right. geuss ill replace the fuel pump this weekend.

VAhunter

Mine did the same thing, a new fuel pump helped a little but the thing that got it going was the fuel pressure regulator. Pull the vacuum line on it and if it feels wet or has a strong fuel smell it's probably bad. Check the fuel filter as well

VAhunter

Well, that's what I get for skimming the thread. Go ahead with the fuel pump. If you get the bed bolts off and lift the bed I would definitely go that route as far as getting to the pump

hotrodford88

thats the plan. pull the bed bolts and set the bed up on the tires and back bumper.

Gizler00

iTrader: (1)

Glad you figured it out. Sometimes these things can be a headache to chase down.

I love the car lot method. Every time I do it it makes me think of the old movie Used Cars with Kurt Russell. Haha

hotrodford88

lol. yep. it only works for a few miles at a time on mine. the fuel pump sounds like pall bearings in a tin can. lol.