wierd idle issue
#1
wierd idle issue
let me start off by saying ive read all the spark threads and done searches but nothing has turned up like my problem.
a few weeks ago my truck started idleing erratically at random times. plus or minus 2-3 hundred RPMs from where it always has.no codes at that point in time. then my water pump went out. so i changed it for a new one. after the pump change i got a P0118 code so i go a new ECT sensor and the code went away, along with the erratic idle. but then the motor would idle ver low like 550-600 RPMS. im getting good spark on all 8 plugs, and the plugs are in good shape. i did a tune up recently as well. but now in any gear except park if i let off the gas the motor idles less erratically + or - 100 or so RPMs for about 2 seconds and then dies. and if im moving down the road it just straight up dies if i let off the gas. if im in park then it idles fine for a couple of minutes and then the RPMs slowy drop until the motor dies. my vaccum gauge say i have about 19 inchs at idle in park
a few weeks ago my truck started idleing erratically at random times. plus or minus 2-3 hundred RPMs from where it always has.no codes at that point in time. then my water pump went out. so i changed it for a new one. after the pump change i got a P0118 code so i go a new ECT sensor and the code went away, along with the erratic idle. but then the motor would idle ver low like 550-600 RPMS. im getting good spark on all 8 plugs, and the plugs are in good shape. i did a tune up recently as well. but now in any gear except park if i let off the gas the motor idles less erratically + or - 100 or so RPMs for about 2 seconds and then dies. and if im moving down the road it just straight up dies if i let off the gas. if im in park then it idles fine for a couple of minutes and then the RPMs slowy drop until the motor dies. my vaccum gauge say i have about 19 inchs at idle in park
#2
#3
#4
#5
#6
#7
Maybe. but, if fuel pressure was falling off at idle to the point that the truck stalled, you would have other problems as well.
I would be tempted to take off the filter housing, have a friend idle the truck in gear, (sitting still please....) and watch the IAC valve, and see what it's doing. If it slowly closes off, till the truck dies..... I would take a long hard look at it, and the wiring.
I would be tempted to take off the filter housing, have a friend idle the truck in gear, (sitting still please....) and watch the IAC valve, and see what it's doing. If it slowly closes off, till the truck dies..... I would take a long hard look at it, and the wiring.
Trending Topics
#9
#10