Question about 1990 Cadillac Deville

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CAR RUNS VERY ROUGH AND HAS NO POWER...MISSING BADLY...CHECK ENGINE LIGHT COMES ON...WAS TOLD AT A DEALER TO REPLACE MAP SENSOR,WHICH WE DID...STILL BAD.. ALSO,CAD.DEALER SAID A/C MODULE WAS NOT WORKING CORRECTLY TO DIAGNOISE PROBLEM AND THATS 386.00 DOLLARS LATER...NEED HELP BAD!!!!!

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Check your timing

Posted on Jul 17, 2009

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Code po107


Just because your getting a code from a sensor doesn't mean the sensor is N/G. The MAP sensor reads the manifold air pressure, that can be anything from a vacuum leak, elec short, bad plug/wire, miss, gasket and the list goes on. It can be a bad sensor too, don't get me wrong. Does it run rough, hard start, did you ck the emissions? First things first Vacuum leaks & gaskets are popular. Once in a while I cross paths w/ a cracked manifold. Don't throw your $ out the window, Do it once & do it right. Good luck

Oct 24, 2015 | Cars & Trucks

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2006 Chevy Trailblazer started to run rough in idle but only after it warms up. My mechanic got P0017 code on his scan tool and told me I needed to replace the Crankshaf and Camshaft sensors. Both sensors...


Bad coolant temp sensor or EGR valve stuck. You can remove and test temp sensor (the one for the ECM--has only one wire) using cold and then hot water and read resistance with ohm meter.

Jan 28, 2015 | 2006 Chevrolet Trailblazer Ext

1 Answer

I have a 92 grand am with a 2.3 dohc, I recently replaced spark plugs (3 months ago) had a miss so replaced plugs this past weekend, and coil pack, still has a miss when it sits and idles. It sometimes...


Do a Cylinder leak Down Test

You may have bad Valves

Always start with a cylinder contribution test,then
cyl leak down,to check mechanical integrety,before
you start throwing parts at other things

Aug 22, 2013 | Cars & Trucks

1 Answer

When I go to start the vehicle the car runs rough.The check engine light comes on and gives the P0171 code. I have changed the map sensor and replaced a vaccuum hose seemed to have fixed the problem.Then...


This sounds like it could be related to a bad TPS. When you have a bad Throttle Position Sensor, it can put too much fuel into the system causing all sensors down the line to be clogged. The MAP sensor you replaced may already be bad again.

Feb 28, 2011 | Dodge Neon Cars & Trucks

2 Answers

98 Chevy Tahoe 5.7 liter engine cuts out and misses. It happens when the engine is up to operating temperature and under load. At idle - after engine is warm - it runs rough sometimes, but when it is put...


Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?

Dec 18, 2009 | 1998 Chevrolet Tahoe

2 Answers

Engine management light comes on and when its sat at lights it runs as rough as a bears arse. replaced lambda pipe 2 sensors on the exhaust pipe and a cam sensor and still runs rough on idol


not sure here ,difficult to tell without seeing motor labouring in front of me so to speak.these motors are not difficult like a renault but any suggestion i make will cost for parts so it will be cheaper to put car into dealers and suffer a wallet drain it will be cheaper in the long run

Nov 22, 2009 | 2002 BMW 5 Series

1 Answer

I'm getting check engine light on my dash, and it tells me that its code P0106. how do i fix this and what is it?


This info coutesy of OBD-II codes.com

Potential Symptoms The following could be symptomatic of a P0106:
  • Engine runs rough
  • Black smoke at tailpipe
  • Engine will not idle
  • Poor fuel economy
  • Engine misses at speed
Causes A P0106 could be caused by:
  • Bad MAP sensor
  • Water/dirt intrusion affecting MAP sensor connector
  • Intermittent open in the reference, ground, or signal wire for the MAP sensor
  • Intermittent short in the reference, ground, or signal wire for the MAP sensor
  • Ground problem due to corrosion causing intermittent signal problem
  • Bad PCM (do not assume the PCM is bad until you've exhausted all other possibilities).
Possible Solutions Using a scan tool, watch the MAP sensor value with the key on, engine off. Compare the BARO reading with the MAP reading. They should be roughly equal. The voltage for the MAP sensor should read approx. 4.5 volts. Now start the engine and look for a significant drop in the MAP sensor voltage indicating the MAP sensor is working.
If the MAP reading doesn't change perform the following: 1. With the Key on, engine off, disconnect the vacuum hose from the MAP sensor. Using a vacuum pump, pull 20 in. of vacuum on the MAP sensor. Does the voltage drop? It should. If it doesn't inspect the MAP sensor vacuum port and vacuum hose to manifold for a restriction of some kind. Repair or replace as necessary. 2. If there are no restrictions, and the value doesn't change with vacuum, then perform the following: with the Key on and engine off and the MAP sensor unplugged, check for 5 Volts at the reference wire to the MAP sensor connector with a Digital Voltmeter. If there is none, check for reference voltage at the PCM connector. If the reference voltage is present at the PCM connector but not the MAP connector, check for open or short in the reference wire between MAP and PCM and retest. 3. If reference voltage is present, then check for existing ground at the MAP sensor connector. If it isn't present then repair open/short in the ground circuit. 4. If ground is present, then replace MAP sensor.

Jan 22, 2009 | Ford Freestyle Cars & Trucks

1 Answer

Engine runs rough after about ten minutes /idles really low


Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.

Jan 16, 2009 | 1991 Plymouth Laser

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