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3.0 running perfect-suddenly running real BAD #828474 08/03/07 04:24 PM
Joined: Mar 2005
Posts: 27
B
bigdirtdog Offline OP
Getting the Wheeling Fever
Hi, I have a 1994 PU with 118K 4x4,this truck has been running extremly well, MPG is 18.5 on recent trip with plently of power from 2000 to 3500 RPM's. As soon as I got back from a road trip of 350 miles it started to run very bad. Idle has drop to 500 and a strange popping noise comeing from the tailpipe, and bottom end torque is gone if it goes below 2700 RPM's. Changed cap & rotor wires, plugs still no help, now it's a process of checking everthing EGR,PCV and vacuum anybody have any ideas let me know. Thanks


94 xtra-cab 4x4 V6 98k, K&N intake, Custom Flowmaster exhaust, Edelbrock IAS Shocks, Cross-Drilled Vented Disc, 31x10.50 AT on American Racing wheels, Hella Headlights 90/130W and Corbeau Sports seats, Addco Sway Bars FR & RR.
From the Off-Road World
Re: 3.0 running perfect-suddenly running real BAD [Re: bigdirtdog] #828475 08/03/07 10:19 PM
Joined: Oct 2003
Posts: 75
cam01 Offline
Getting the Wheeling Fever
When was the timing belt done last? One of the cams could have jumped a tooth.


88 V6 4Runner, 3.4 swap, SAS, front E locker, rear EZ locker, dual cases 2.28/4.7, 63" Chev rears, rears up front etc.
Re: 3.0 running perfect-suddenly running real BAD [Re: bigdirtdog] #828476 08/04/07 05:05 AM
Joined: Dec 2000
Posts: 760
O
oldsub86 Offline
Rock Warrior
Fuel Filter?


1995 V6 SR5 5 speed 4X4 - 4Runner - dark blue
Re: 3.0 running perfect-suddenly running real BAD [Re: oldsub86] #828477 08/04/07 03:07 PM
Joined: Mar 2005
Posts: 27
B
bigdirtdog Offline OP
Getting the Wheeling Fever
The timing is spot-on, belt has less than 30k on it. Fuel Filter is brand new less than 6 months. Changed plugs and finally ENGINE light came on now. I might be getting closer to the fix. 2plugs had a oily deposit on them, 1 tech at my Toyota shop said he could smell Diesel fuel and just maybe I could have put in some gas that was contaminated with a small amount of Diesel, I have discounted that as being highly unlikely. But who knows, I would think that all plugs would have the show signs of bad fuel. Could this be a valve seal leak fouling the plugs just enough to cause incomplete combustion? I getting the diagnostic P-code and should get a little closer to figuring this out. Thanks to all


94 xtra-cab 4x4 V6 98k, K&N intake, Custom Flowmaster exhaust, Edelbrock IAS Shocks, Cross-Drilled Vented Disc, 31x10.50 AT on American Racing wheels, Hella Headlights 90/130W and Corbeau Sports seats, Addco Sway Bars FR & RR.

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