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jolind
Dodge Dakota
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3/15/2003
17:40:59
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 Subject: Performance problem
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Message:
I've had an intermittent problem with my 2000 3.9L engine racing between shifts - not dropping down normally when the clutch is depressed. It happened only when the truck engine was first started and cold, but not everytime. When it did happen it corrected itself after the first couple of minutes and does not set a trouble code on the PCM.
Well now it's stuck that way. Whatever was going bad is now gone for good. The engine races between shifts warm or cold and no longer corrects after a few minutes. Still no PCM codes.
Anyone had this problem? Anyone have any ideas? I'd sure appreciate the help??? Thanks...
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Greg555
Dodge Dakota
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3/15/2003
18:03:31
|  RE: Performance problem
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Message:
my only idea is that mabye the trottle cable is
gettin stuck somewhere. you check your tb for any
kind of blockage? pop your hood and look for the
simple things. and if thats all good then i have
no idea
Greg
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jolind
Dodge Dakota
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3/15/2003
19:13:19
| RE: Performance problem
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Message:
Thanks for the RE: Greg. Wish it were that easy. Checked and cleaned cables. Also looked for obvious stuff like vacuum line probs.
It's almost as though the engine surges in speed momentarily before dropping off when you shift. In order for me to shift this thing, I actually have to remove my foot from the accelerator and wait a few seconds for the rpms to die off before hitting the clutch. If I were to realy get on this thing for a quick accel - I'd redline it for sure. It also seems to be running at higher rpms at cruising speeds in 5th gear.
It does this standing still in neutral also. If you hit the accelerator it seems to surge up in rpms unusually quickly and drop off much slower than nomal. It almost acts as though the timing is too far advanced. Or something (sensor) is causing a timing malfunction.
DJ
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Zane Anderson
Dodge Dakota
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5/03/2005
11:25:02
| RE: Performance problem
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Message:
I had that same problem a couple of months ago. I thought
the same thing you guys are suggesting. Computer and
such. What it turned out to be was the throttle spring.
That little coil spring between your throttle body and your
intake. Road debris - in my case mud from off-roading' -
got into it and was causing a hang up.
The space between the intake and the throttle almost
seems to lend itself to dirt and debris. Mine was taking off
as soon as I was letting off the clutch. It was like having
cruise control. I wouldn't even have to hit the gas on the
interstate, and the RPM's would top out at 4500 in neutral.
What I did was take some carb cleaner - not WD 40 - and
spray it on the entire throttle system; cable, coil spring and
all, Since doing that I haven't had it happen again. Hope
this helps.
Zane Anderson
House Church
Network
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