1999 Isuzu Rodeo Question Car is having a hard time accelera

Tiny
LEMMENHOPPUS
  • MEMBER
  • 1999 ISUZU RODEO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,873 MILES
Here is a bit of history on the car. In the early part of July I was driving on the highway and instantly my car went from driving smoothly and quietly to driving like a nightmare. The fan clutch was roaring, the engine seemed to be working to hard AND my car began to have trouble accelerating in the lowers gears. Thinking it was a transmission problem that neither my fiance or I have any knowledge in fixing we took it to AAMCO transmission center. They found nothing to be wrong with the transmission after having given my car an internal scan and a transscan. So they asked if they can do engine diagnostics which was a series of 12 tests and cost me about $125 to run the tests. I gave them the go ahead. What they found was that my intake manifolds needed to be cleaned and my EGR valve needed to be replaced. When all was said and done I was charged $485. The car was running like a dream quiet, smoothly, and like I ahd remembered it running. Three short weeks later my car does the exact same thing while on the highway 154 miles from where I took my car in the first place. Not knowing what to do we took the car to a mechanic that my parents have been using for a while now and for some weird reason the man cleaned out my manifolds, replaced the fuel filter and cleared out the cars airflow system. WELL the man didn't drive the car and he said it was normal for it to be roaring like that, so we paid 202 dollars and left the place. We drove it back to San Antonio (154 miles) and took it to the initial mechanics. They checked it again and swore up and down it was my fan clutch. They wanted to charge us 300 so we took the car back and did it ourselves. WELL the fan doesn't roar at idle anymore BUT it is still slow to accelerate and it still revs at 2 to 4 thousand RPMs in low gears EXCEPT now once we hit a certain threshhold the car does this jerking motion and it clicks and it runs PERFECT it picks up speed like a dream. It's quiet it accelerates at regular RPMs with out hesitation. BUT we go through the same song and dance once the car is turned off. So my car now has the up to standard air flow, a new massive air flow sensor, fan clutch, fuel filter, and a new set of spark plugs. Some one suggested it could be the computer others say its the transmission. What do you all think?
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Sunday, August 22nd, 2010 AT 3:17 PM

2 Replies

Tiny
ROB KANDUTH
  • MEMBER
Sound to me izusu has some issues with this problem with the tranny ligtht and having to shutt down the vehicle to start all over so its not starting out in third gear from stop sign mine is a 1994 rodeo v 6 thought my son did somethig to the computer with the stereo hook up but now I been on this area sounds like there s a big electrical issue that no one can fix I wish I could get a degree to not be abl to fix the promblem and rip people off I have put alternator in for over power almost blowing up new battery almost crank sensor plugs and wires tranny computer engine computer coil pack and module tps I was told not the tranny I will be going back tranny shop again today I even tried another tranny comp and thought I got a bad coil pack wow two weeks I have had this truck and every day I been working on it or droping it off somewhere to get lied to again I think enough of the bull and someone needs to get a handle on this crap
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Monday, August 30th, 2010 AT 4:31 AM
Tiny
LEMMENHOPPUS
  • MEMBER
Hey Rob! Thanks for the advice I will keep that in mind. It turns out that it was still the fan clutch. Buying parts from AutoZone proved to be a bad bad thing. The fan clutch that Auto Zone sells, Torqflo, is supposed to be loud. It is more effective at cooling the engine BUT you do lose horse power. A LOT of horse power so you begint o run inefficiently and gas will kill you in the long run. I would suggest using a 4 season or a high end quality Hayden fan clutch if you should need to replace it. We used a 4 seasons and it is running PERFECTLY!
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Monday, August 30th, 2010 AT 3:03 PM

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