Question about 1989 Ford Thunderbird

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1996 Ford Thundrbird- RPM Surging

The RPM on my 1996 Thunderbird are surging. It feels like the car is driving itself. When I put it into drive it shifts very hard. You can tell its idling high. I can take my foot off the gas and it will continue to drive unless I put the brakes on. The hand on my dash board shows the RPM flucuating between 1-2... What could be causing this??

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Hello first thing you want to do check for a vacuum leak arond the throttle body or intake if every thing checks out good have your THROTTLE POSITIONING SENSOR (TPS )sensor checked for out of range goodluck please rate

Posted on Oct 02, 2008

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Posted on Jan 02, 2017

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2000 Suzuki Esteem 1.8L.. I went to start my motor & turned it off right before started. I heard some kind of backfire. Then I started it and it's been idling high, the surging. Please help!!


scan it yet, a FULL OBD2 scan? why not?if not.
now is the time...


the 1.8L J18 engine, same as the older Sidekick sports used.
same engine , know it I do.
its the precursor to the J20, (j18 is under-stroked, j20 with many of the same parts. inside)
the back fire means explosion sound to rear end of tail pipe?
yes, that is rich raw fuel in the muffler. plus Air.
if there are exhaust cracks and then engine goes rich this can happen( a double failure)
if how ever BACK means, back to the Air cleaner, then that be different reasons, (timing)


engine now starts.?>
engine runs.? has full power, car drives ok.?
JUST?
SURGE,. you never said.

does engine get hot? 180F or more and holds (y/n)
ever get a full tuneup this decade,
most dont so i tell you, bad spark causes, misfire and raw fuel is wasted to the exhaust and sure can go boom.

surging usually means the ISC can not control idle
so it hunts, (a suzuki software engine on all 90s engines)
PCM errors, inside it. (dangerous too)
a modern car, if idle goes too high the ecu commands the ISC closed
and holds it there solid, (safe way , no hunting allowed now)]
so if this car surges, it's , lean engine.

some think flooding is surging.
and this is usually below 800 rpm,
almost stalls, then corrects, seems like a surge.

next time post rpm range of surge.?????

do not drive a surging engine, do not be like Toyota drivers. (over 800 rpm hot)

surge from 400 -800 rpm is class 1 surge.
surge from 800 to say 2000 RPM is class2, and very dangerous to some folks, (key off, get car fixed, tow it)

The ECU controls idle speeds. (hard coded servo controls)

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if were my car i would have the voltage regulator checked first

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Put new plugs and wires in ran for 2 weeks and


You may have a faulty ignition control module. On most rear-wheel drive Fords it is located on the left side inner fender, near the hood hinge. It should have a sticker on it that partially reads "EDIS". You may find it has split open from corrosion.

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Sputtering real bad if it dont warm up


clean your idle air control valve on your throttle body and clean the throttle body with spray carb cleaner at the same time.

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How to replace the o2 sensor in a 1996 ford


What engine? The problem is not a O2 sensor. The computer ignores o2 sensor reading until the engine is warm.

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Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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