Question about 1995 Cadillac Eldorado
It Starts Fine but Quickly Shuts off after you remove your foot off the gas pedal
Your codes indicate faulty readings from the MAP sensor and Powertrain Control Module. Problems with either of these would mean the engine computer could not accurately determine fuel injection ratios, causing the symptoms you describe. When you take your foot off the gas, the engine cannot regulate the combination of air and fuel.
This could mean that the MAP sensor is bad, but it could also indicate some other miscellaneous fuel injection or ignition problems.
If you have an advanced scanner that gives you a readout of more than just the error codes (such as the actual senor readings) you may be able to isolate the problem and confirm it is the MAP sensor, which you could buy and replace yourself with the air of a repair manual. If you cannot isolate it as the MAP sensor or determine that it is the PCM, you will need to take it to the dealer, as the PCM will need to be recalibrated on their computers even if you install it yourself.
Barring the relevant knowledge or equipment needed to further diagnose the problem, you'd want to take your car to a mechanic you trust to work on Cadillacs - know that they can be a bit more complicated than their GMC and Chevy cousins - or to a dealer to check the systems.
Posted on Oct 24, 2012
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Posted on Jan 02, 2017
Change fuel filter, and air filter. After your change the filters hook a fuel pressure guage to the fuel rail. The spot to hook up at looks like a valve thats on your tire. Should be no less than about 35 psi. If fuel pressure is good and it still struggles during warm up. Look on the throttle body and see if the linkage can be adjusted or if there is a adjustment screw. All else fails change throttle position sensor.
Wouldnt hurt to put new spark plugs in if you havent already done so.
Posted on Feb 12, 2009
Have it scanned and look for codes first, but then fuel trim, O2, and MAS air flow readings. I'm going to guess it's running lean and you have an air leak in the throttlebody.
Posted on Oct 23, 2009
When the car is completely cool,check the electric fan(s) for smooth rotation.
Clean/check/change the thermo sensor,contact and wire.
Excavate air pocket in coolant system / check for head gasket leak
This test will kill two birds with one stone.
MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!
RAN THIS TEST IN A WELL VENTILATED AREA ONLY!
You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!
Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .
Top of the coolant reserve tank
Let it ran for 10-15 minutes.
Monitor for air pockets escaping from coolant reserve tank.
Small amount of bubbles is OK at 1-5 minute mark
After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.
If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.
Give the thermostat host few gentle taps.
If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.
Let engine cold down and top off coolant reserve tank.
Start monitor for coolant lost
A coolant flush is require every 2 years or 24,000 miles.
I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.
Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.
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Posted on Dec 05, 2009
EIther the IAC or throttle postion sensor is dirty or faulty. Or leaky vacuum hose somewhere. As long as it is not missing and running weird, then you may have bad coil packs.
You can go to autozone.com and register for free online repair manual for your vehicles if you need it.
Posted on Jan 06, 2010
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