Question about Ford Contour

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Intermittent misfire at idle and underload. Runs fine otherwise. How is it determined that ECM is bad?

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Very rare for ecm to go bad on contour thats a sign of bad plug or wire

Posted on Jul 27, 2008


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Symptoms of bad distributor

a bad distributor indicates in several ways
misfiring on one particular cylinder --- cracked cap, carbon track diverting the current for the spark
multiple misfires -- corrosion in the HT leads receptacles
intermittent spark ---rotor button spring contact not touch carbon button in cap--replace cap
varying timing --- using a timing light , the timing varies between BTDC and AFTDC--- worn bushes in the body, worn shaft, bent shaft, excessive end float in the shaft
faulty advance plate connections---stuck or loose
if electronic --- exciter touching the pickup sensor( worn shaft/ bushes
without a make ,model year and control method (efi or electronic distributor) it is difficult to determine the cause of rough idling and the rpms variation
that can be from vacuum leaks, low fuel pressure , mixture adjustment if carby or mixture control if ECM
if EFI unit run the fault codes for pointers to the problem area

May 05, 2016 | Cars & Trucks

1 Answer

Engine miss when cold, engine light on, new gas, air filter. fuel pump in tank. hot engine loght goes on off, when off at stop stalls out engine light off.

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Dec 16, 2015 | Cars & Trucks

1 Answer

01 mazda tribute has intermittent miss, no CEL, what else can I try?

does the spark tester test for spark or the strength of the coil? an over the plug coil should be able to jump a 40kv gap on a gap spark tester. since the misfire is intermittent then it may not set a misfire code,but it will show a failure record in mode6 of the scan tool on test 53.

Jun 06, 2012 | 2001 Mazda Tribute

1 Answer

Have 95 model Mazda e2000 econovan stalls idles set to low also on highway going up hills feels like runs on 3 cylinders and then goes back to normal and fitted a thermostat in it today no leaks just not...

Did the vehicle overheat?Feels like it runs on 3 cylinder this is a misfire underload, you are dealing with a misfire from the wires itself to the cap and rotor and even the sparkplug.

Mar 02, 2012 | 2004 Infiniti I35

2 Answers

Stalls when I put it in gear or come to a stop runs fine otherwise

you need to change your idle motor (iac valve) this controls the air that engine needs to mix with the fuel to run.simple to do yourself,two screws and one 2 wire plug.

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P0302 cylinder 2 misfire detected enginge revs

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1 Answer

Engine misses bad at idle often stalls, runs ok

Code 12 isnt going to tell you anything. Find out what cylinders are misfiring and go from there.

Nov 15, 2009 | 1994 Chevrolet S-10 Blazer

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