Question about Ford Thunderbird

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1990 Ford Thunderbird 3.8L, Poor Mileage and performance, add. info.

Additional information of problem to add. I think it is running rich, some black soot on exhaust pipe tip opening. EEIC-IV ignition control module was tested on bench at Autozone and checked out ok! Check engine light usually does not come on until engine is warm then it won't go off. Turn ignition off then restart and after taking a few seconds check engine light returns on and stays on most of the time, may flicker once in a while. Fuel pump assembly was changed along with fuel filter. Have ran fuel system cleaner thru system. Auto. Trans. slips in 3rd gear upon easy acceleration occasionally and it will fall out of cruise control in OD. when going up many hills and all steep hills. Already changed trans. filter and refreshed atf with no avail. I believe performance and poor mileage issues are separate from my trannie issues? The check engine light came on once before I changed the engine but comes on all the time now. It all started at about 4k on the new engine. It is at 9k now. Trans was remanufactured with zip ties on bolts but I don't know from when. The new engine I installed, and am not used to cars that are newer than 1972 or are pre obd-2. Not familuar with auto transmissions either. Thinking I can clean my O2 sensors. Not sure the direction to go?

Posted by Daniel Hagen on

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Stephen

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  • Ford Master
  • 21,873 Answers

The first thing you and I need to know is what the trouble codes are that are stored in the computer.
Once you know that, you will have a direction to go in for more testing.
Without the codes you are shooting blanks.
And I doubt the transmission problem has anything to do with the engine.

Posted on Jan 30, 2013

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5 Related Answers

240cpa

  • 548 Answers

SOURCE: check engine light - 240 enfgine running rich

It could be a number of things but must be diagnosed via computer code check. If you are unable to do so yourself, find a reputable Volvo mechanic. It could be the air mass meter, a bad O2 sensor or something related. Mine turned out not to be the air meter but a bad ground wire going to it. Didn't find out until $400.00 later.

Posted on Jan 25, 2009

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Michael Gutwein

  • 104 Answers

SOURCE: P1405,P0141 F150 2001

Ford has problems with the DPFE sensors that has to do with the EGR. its just a code that points you in the direction of the problem. you could have a bad DPFE or egr or just a simple clogged hose. there should be 2 hoses on these f150s the only way to tell is by checking hoses otherwise you need more tools to check these things. a vacuum test on the DPFE sensor to see if it reacts.

the other code is an O2 sensor code. heater problem. could be different problems or a bad O2 can cause a rich condition cause low fuel mileage and also cause the EGR system to clogg over time.
I dont knwo what else to help you with because its one of those things that just needs to be looked at in person. your best bet is check the DPFE hoses. should be near EGR and look for rubber hoses connecter to a sensor. should have 2 hoses connected to it. Google a pic of one so you knwo what they look like.
Good luck

Michael
ASE certified
plz rate

Posted on Feb 09, 2009

Anonymous

  • 2 Answers

SOURCE: engine stalls after cold start-up & release from high speed idle

I had a similar problem.  I found the filter cartridge below the pcv valve had carboned up, and after the crank case pressurized, oil was forced out the pcv supply line to the throttle body.  The idle air control valve solenoid got oil in it and caused my problem, but only when it was cold.  The pcv cartridge is accessed by removing the pcv valve and the rubber fitting that the pcv valve mounts in.  It can then be fished out with a pick set, and it is a pain because you can't see it, but you can get you hand back there.  I hope this helps you.

Posted on Feb 28, 2009

Dan C

  • 93 Answers

SOURCE: I have a 2001 Dodge Ram 1500 5.2L,

The plenum problem should not affect compression tests. It allows oil to get sucked into the intake and will cause carbon buildup, plug fouling, and pinging. If you have zero compression on a cylinder, it is usually a valve problem. Even a burned piston will make some compression, unless it has a big hole in the middle.
Sorry, but if your compression results are to be trusted (and it seems they are), then you have to tear a head off to find the problem, or at least get a borescope in it.

Posted on May 20, 2009

Anonymous

  • 1 Answer

SOURCE: BMW E46 320d SE 2002 Poor starting from cold, OK when warm.

rub your **** on the key fob

Posted on Jul 22, 2009

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