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davestruck
Dodge Dakota
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2/17/2004
11:33:30

Subject: Acceleration Problem
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I have a severe acceleration problem on a 1992 V-6 3.9L Automatic with 150,000 miles. I can only press the accelerator down about a half an inch. Any more than that the engine cuts out/ will not fire. The engine has plenty of power as I can hold the brake and accelerate to the point of the engine overpowering the brakes, while at a stop.

I replaced the fuel filter. The fuel pump is making a lot of noise. I havn't ruled out fuel rate/pressure problem but I wouldn't think I could power tourque the engine or reach 55 mph, which I can given a few minutes.

I suspect a sensor problem.

How do I pin point the problem?




TPS
Dodge Dakota
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2/17/2004
11:57:17

RE: Acceleration Problem
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TPS ???



daffydak
GenIII
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2/17/2004
14:49:12

RE: Acceleration Problem
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might be the tps (throttle position sensor) are you getting a check engine light? if so it might be the tps. other than that im stumped, guess you should wait to hear from larry on this one

mopar=mopower

whitedakota2
Dodge Dakota
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2/17/2004
16:16:34

RE: Acceleration Problem
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Did you check for codes?

Take it to a mechanic that has a scanner, watch the O2 to see if the engine is running lean or rich. Also it could be a TPS as suggested above.



Daves Truck
Dodge Dakota
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2/18/2004
00:51:12

RE: Acceleration Problem
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I tested the voltage on the TPS it increased evenly from .75V to 2.5V.
I replaced the coil thinking it may be a weak spark but that really went against the fact that It had power while brake tourqing.

While test driving I noticed that the engine didn't really cut out all the way, there was some missfiring. I verified that the pulse ring in the distributor wasn't loose. I had super glued it the previous day.

I started to focus on the fuel delivery. I noticed a schrader valve on the fuel rail. I bled out air and it is running much better! I still can't fully accellerate. Air may be leaking into the fuel lines as it is driven. I will focus on the air in the fuel lines for now.

I am unable to get any flashes to reveal codes. I try the on off, 3,4 and 5 times method. I tried clearing it by disconnecting the battery also.



whitedakota2
Dodge Dakota
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2/18/2004
11:32:04

RE: Acceleration Problem
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Do you have a full tank of fuel?

If not, see if you can get to a station a fill it. Then see how it drives.



Dianes 88 Dak
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2/18/2004
13:42:46

RE: Acceleration Problem
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Have you check cat, could be clogged and bad o2 sensor.

Diane's 88 Dakota [MOPAR RULES...other's... well, you know] http--dodgetrucks.org-cgi-bin-index.pluser=1054&cat=500&thumb=1

Daves Truck
Dodge Dakota
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2/18/2004
18:02:35

RE: Acceleration Problem
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Diane u need ur cat checked ???? ;-P



Dianes 88 Dak
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2/18/2004
20:19:34

RE: Acceleration Problem
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No, thanks, LOL!
By the way I don't have one anymore.
Good luck with your problem.

Diane's 88 Dakota [MOPAR RULES...other's... well, you know] http--dodgetrucks.org-cgi-bin-index.pluser=1054&cat=500&thumb=1

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