2009 chevy silverado 2500hd 2wd wont idle just dies
December 1st, 2016, 4:04 PM
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2009 chevy silverado 2500hd 2wd wont idle just dies
HI was writing here today to hopefully get someone's help with my chevy silverado gas engine it is a 2009 2500hd for a few weeks it had a p0121 code but was running fine. i was recently on the highway at 75 mph
and stopped for gas when i got back on the road the truck would not reach 70 if i gave it more throttle it would start to decrease speed. i made it home and the next morning the truck wont start now. it was starting and running for may be 2 sec before it would die. as if their was no idle but it did not rev up to high rpm just start and die. so i cleaned the MAF sensor changed the air filter to a new k&n took off the throttle body with the butterfly on it and the TPS cleaned the thing very well and changed the TPS. reassembled the unit and checked the fuel pressure it is 55-60 and it not dropping out when the engine dies. immediately after i press the starter and it starts before it dies i can press the gas pedal and it just dies faster. no more coeds have come on since the initial clearing of the p0121 any ideas? is it possible that the throttle body that has the motor for the butterfly built into it may need to be changed and if so how would i test that part.
and stopped for gas when i got back on the road the truck would not reach 70 if i gave it more throttle it would start to decrease speed. i made it home and the next morning the truck wont start now. it was starting and running for may be 2 sec before it would die. as if their was no idle but it did not rev up to high rpm just start and die. so i cleaned the MAF sensor changed the air filter to a new k&n took off the throttle body with the butterfly on it and the TPS cleaned the thing very well and changed the TPS. reassembled the unit and checked the fuel pressure it is 55-60 and it not dropping out when the engine dies. immediately after i press the starter and it starts before it dies i can press the gas pedal and it just dies faster. no more coeds have come on since the initial clearing of the p0121 any ideas? is it possible that the throttle body that has the motor for the butterfly built into it may need to be changed and if so how would i test that part.
