Welcome Visitor! Please take a few seconds and dopey fudd
New Member
- Joined
- Jan 23, 2010
- Messages
- 14
- Reaction score
- 0
- Points
- 0
- Location
- akron, ohio
- Vehicle Year
- 93
- Make / Model
- ford
- Engine Size
- 3.0
- Transmission
- Manual
instead of hijacking others threads, I am making my own.
here is what I have been fighting.(most copied from another threads)
93 3.0. when the temps drop below 50 degrees, the truck starts right up. runs at around 2500 rpm, then as it starts to drop to regular idle, I get a check engine that flashes 3 times, the idle then drops to around 500 rpm, or dies, of its really cold out. then it spikes back up to 2500, and slowly decreases to standard idle, around 1000 rpm. I have checked the idle air sensor, and replaced the coolant temp switch. cannot pull the code from ecm, due to being a soft code. throttle body is clean, maf is clean ,but will clean to be safe.
I'm at a loss at this point. it did it last year in the fall- winter but stopped. started in the spring, and stopped, all summer long. started again in mid november. its getting worse, to the fact that if it dies now, I need to hold the throttle open to restart.
update, --
with the warmer temps, the truck seemed to be starting easier over the last few days.
Friday---, the iac went out completely. I know this because of last time it went out. the idle stays at where the rpm's were at when I let off of the trottle. and when I disconnected it, they dropped.
saturday-- I went to a yard, and pulled 2 of them off of 2 3.0 motors. all had the same part #.
the first one when I put it on loped severly, but continued to run. no check engine.
the 2nd fired right up, had NO issues. so I left it on.
sunday, I started the truck up. it fired up just fine. when the idle started to lower, it started lopeing severly, and died. I then had to hold the throttle down for it to fire up. it loped until I put my foot on the throttle for around 30 seconds. then it was fine. its acting like its not getting air/ chokeing off too much.
monday, same ordeal, had to hold the trottle to keep it running. but this time, the check engine light flashed again, re-entering the code.
tuesday, I found the cold air temp sensor.
I disconnected the iacv after it started, It kept it running, but idle was rough, and lopeing. check engile light DID NOT come on, when it was disconnected.
I reconnected it, and unplugged the maf. the idle smoothed out slightly, check engine light CAME on. went off after I reconnected the maf, idle stayed the same.
disconnected the cold air sensor. no change at all. check engine light CAME ON, went off after reconnection.
I let the truck sit to let it get cold and disconnected the maf. and started the truck. the check engine light was on, but the truck still bottomed out then surged. the same as it did before the iacv went out. ruling out the maf.
I also checked for vacuume leaks, for the cold idle issue. didn't find one.
I am at a loss, I am worse off than I was.
here is what I have been fighting.(most copied from another threads)
93 3.0. when the temps drop below 50 degrees, the truck starts right up. runs at around 2500 rpm, then as it starts to drop to regular idle, I get a check engine that flashes 3 times, the idle then drops to around 500 rpm, or dies, of its really cold out. then it spikes back up to 2500, and slowly decreases to standard idle, around 1000 rpm. I have checked the idle air sensor, and replaced the coolant temp switch. cannot pull the code from ecm, due to being a soft code. throttle body is clean, maf is clean ,but will clean to be safe.
I'm at a loss at this point. it did it last year in the fall- winter but stopped. started in the spring, and stopped, all summer long. started again in mid november. its getting worse, to the fact that if it dies now, I need to hold the throttle open to restart.
update, --
with the warmer temps, the truck seemed to be starting easier over the last few days.
Friday---, the iac went out completely. I know this because of last time it went out. the idle stays at where the rpm's were at when I let off of the trottle. and when I disconnected it, they dropped.
saturday-- I went to a yard, and pulled 2 of them off of 2 3.0 motors. all had the same part #.
the first one when I put it on loped severly, but continued to run. no check engine.
the 2nd fired right up, had NO issues. so I left it on.
sunday, I started the truck up. it fired up just fine. when the idle started to lower, it started lopeing severly, and died. I then had to hold the throttle down for it to fire up. it loped until I put my foot on the throttle for around 30 seconds. then it was fine. its acting like its not getting air/ chokeing off too much.
monday, same ordeal, had to hold the trottle to keep it running. but this time, the check engine light flashed again, re-entering the code.
tuesday, I found the cold air temp sensor.
I disconnected the iacv after it started, It kept it running, but idle was rough, and lopeing. check engile light DID NOT come on, when it was disconnected.
I reconnected it, and unplugged the maf. the idle smoothed out slightly, check engine light CAME on. went off after I reconnected the maf, idle stayed the same.
disconnected the cold air sensor. no change at all. check engine light CAME ON, went off after reconnection.
I let the truck sit to let it get cold and disconnected the maf. and started the truck. the check engine light was on, but the truck still bottomed out then surged. the same as it did before the iacv went out. ruling out the maf.
I also checked for vacuume leaks, for the cold idle issue. didn't find one.
I am at a loss, I am worse off than I was.
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