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My 1997 Thunderbird, 4.6L, idle bogs down when in gear after engine warms up. Before, the rpm would stay the same in park or in gear. Does computer make engine raise up 50-75 rpm when in gear to prevent rpm from being too low ? If so, mine is not doing that. Awhile ago I changed transmission fluid. While filling with new fluid, I put transmission in gear and rpm went up and then back down again in park or neural. I checked voltage at idle control valve, and voltage did not increase when putting in gear. Any ideas ? Thanks ! ! George

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6ya6ya
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Posted on Jan 02, 2017

tripletauto
  • 1450 Answers

SOURCE: Idle on 5.3L Silverado

remove the air intake and clean throttle plate. using a rag and carb cleaner spray it down hold open and wipe down

Posted on Dec 08, 2008

  • 6982 Answers

SOURCE: 98 Jeep Grand Cherokee Stuck in 1st gear!

I would drop the trans pan and change fluid & filter. If you find an extreme amount of debris in pan, filter may have become partially plugged, which can lower internal pressure. Only problem is that if there is enough debris to plug up filter, it indicates wear inside unit, which a fluid change will not correct (no chemical will) But, if problem becomes somewhat better after oil change, an additive such as Lucas conditioner may prolong useful life somewhat.Otherwise, have unit rebuilt.
good luck

Posted on Mar 04, 2009

SOURCE: Have a 1997 2.2L Chevy Cavalier automatic. The

Does it feel like the shifter cable is actually moving the detent in the transmission? I've seen a broken shifter cable in a cavalier a while back with the same symptoms you described. Check the cable where it connects to the transmission. It's under the hood on the drivers side.

Posted on Dec 03, 2009

  • 1 Answer

SOURCE: 1997 Nissan Hardbody has rough idle/surges/stalls

ok i have the same truck my timing was off 3 teeth but mine wouldn't kick out of high idle is y mine was surging but know with timing right no vacuum leaks i cant get it below 1400 but when a vacuum turns on it almost kills my engine any thoughts i know i got a vacuum line mixed up idk were though

Posted on Jan 19, 2010

Cycoman
  • 81 Answers

SOURCE: 97 Nissan Maxima. Where do I fill Transmission Fluid?

yea lol the make a certain funnel fir it cost around 3 bucks at any auto store really long end on it

Posted on Mar 23, 2010

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