Please Help!!!
#1
On The Tree
Thread Starter
Please Help!!!
Truck is a 2000 silverado 4wd 5.3 and i have got this awful set of lean codes (Bank 1 and 2 system lean) The truck has a rough idle and started after i changed my knock sensors i.e intake gaskets are good, 02 sensors are good, and i ran some seafoam through the gas so its not the injectors either. This problem is getting expensive, could it be the pcv valve/tubing? the little sensor on top of the intake manifold under the engine cover,with the black plastic tubing and green service cap? or where the egr tube goes into the side of the intake? Please help i need to find the fix asap!!
#3
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#4
Custm2500's Rude Friend
iTrader: (17)
Just checking.
You would need to find the vacuum leak allowing the air in.
Have you tried un plugging the MAF to see if runs any better? it will set a light for the MAF but see if it also sets lean codes.
Also look into the FPR Fuel Pressure Regulator and Fuel Pressure. These 2 things can cause hard starts and lean codes as well.
You would need to find the vacuum leak allowing the air in.
Have you tried un plugging the MAF to see if runs any better? it will set a light for the MAF but see if it also sets lean codes.
Also look into the FPR Fuel Pressure Regulator and Fuel Pressure. These 2 things can cause hard starts and lean codes as well.
#6
On The Tree
Thread Starter
Just checking.
You would need to find the vacuum leak allowing the air in.
Have you tried un plugging the MAF to see if runs any better? it will set a light for the MAF but see if it also sets lean codes.
Also look into the FPR Fuel Pressure Regulator and Fuel Pressure. These 2 things can cause hard starts and lean codes as well.
You would need to find the vacuum leak allowing the air in.
Have you tried un plugging the MAF to see if runs any better? it will set a light for the MAF but see if it also sets lean codes.
Also look into the FPR Fuel Pressure Regulator and Fuel Pressure. These 2 things can cause hard starts and lean codes as well.
#7
On The Tree
Thread Starter
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#9
On The Tree
Thread Starter
#10
TECH Enthusiast
Find someone with a smoke tester and get the intake smoke tested.
Last edited by Fast355; 09-29-2015 at 02:29 PM.