Question about Ford F-150

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WILL NOT FIRE,HAVE SPARK,COMPRESSION IS EXCELLENT,FUEL PRESSURE AND FLOW IS GOOD,CHANGED THE CAM AND CRANK SENSORS AS WELL AS THE COIL PACK.I DROPPED THE EXHAUST AT THE MANIFOLDS AS I THOUGHT THE CATALYTIC CONVERTERS WERE PLUGGED. I PLUGGED A DIFFERENT ECM IN AND I ONLY GET "ERROR" AS THE CODE WHEN I PLUG IT INTO A COMPUTER. THE ENGINE TUURNS OVER AND OCCASIONALLY TRIES TO FIRE, BUT WILL NOT START. WHAT COULD THIS BE??????

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Hi :)Try spaying some gas in the trottle body while it is being turned over and if it fire up check for a fuel regulator looks like a small EGR valve.

Posted on Mar 17, 2011

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97 oldsmobile achieva wont fire changed coil pack spark plugs cam sensor still wont start


Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

Nov 04, 2016 | Oldsmobile Cars & Trucks

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Series one yaris no spark ?


Guessing you have actually removed each plug attached to coil and grounded to see if the coils are firing. The fact that you have voltage in does not mean voltage out of coils...they do fail.
If they fail try known working coil to test. Checked correct timing? Check cam sensor if equipped? Check knock sensor? Engine ground cable intact?

Mar 08, 2015 | Toyota Yaris Cars & Trucks

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93 Buick PA ran out of gas, batt died. Change battery and put gas,new fuel filter,New coils and base spark wires,cam and crank censor,fuel pump /sending unit still no start


Check for a good spark at the plugs ,if ok check fuel pressure and fuel flow. fuel pressure should be around 300 kpa, Flow around 500 ml, in 30 seconds.

Feb 23, 2015 | 1993 Buick Park Avenue

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How to check a ignition coil pack to see if its good,


the coil does not crank the engine , the starter does that, sorry.
(if you ever had to hand or foot crank and engine , youd under stand that. (like motor cycles or boat engines, or per 30s cars.)

in fact will crank all day with no spark parts on car..

x2, the scan tool does tell you why there is NO STARTS, CRANKS OK. The pcm can detect, one missfire in 10 cmp;ckp signals.
  • CRANK FOR 5 SECONDS
  • release, key
  • scan tool has DTC errors?, read the believe them.
no engine stated of 4 or more,

U checked everything but spark,
why, check spark at all cylinders, all most fire or the engine will not run or stall.
That test be first, if not starting (AFTER SCAN TEST)

IF NO spark fuses are next , not last.
lets do no start fails tests. (cranks perfectly 200 to 300 rpm)
  1. : check fuses
  2. key on, CEL lamp must glow, if not , ECU fuse blown.
  3. crank with scan tool , see P03xx DTC errors, see RPM dead.?
  4. check for spark? got spark x4 or times number of cylinders?
  5. got spark try test fuel now, runs for 3 seconds?
  6. yes, runs on test fuel now means lost fueling
  7. no, dont run on test fuel, means, 1 to 5 done wrong above or engine compression bad.
  8. bad fueling, huge number of tests. check fuel pressure now.
confused, try a shop and watch them, learn.

Jan 12, 2015 | 2005 Suzuki Forenza

1 Answer

My Mitsubishi pajero 3.5 v6 is back firing I have change coil pack , cam and crank sen Ora,spark plugs. What could be the problem


getting to much fuel through injectors there is to much back pressure relieve the back pressure by what looks like a valve stem on the fuel rail and this should take care of it

Sep 08, 2014 | Mitsubishi Pajero Cars & Trucks

1 Answer

Ighnition coil problem


NEED TO RUN A FUEL INJECTOR FLOW TEST. SEEMS YOU MIGHT HAVE A INJECTOR . IF ALL PLUGS ARE AS THEY SHOULD AND PLUG WIRES ARE GOOD ,FUEL FLOW OR COMPRESSION IS LEFT.YOU CAN TRY MOVEING PLUGS AND WIRES AROND FROM HOLE TO HOLE TO SEE IF MISSFIRE MOVES , IF IT DOES THEN YOU MOVED YOUR CAUSE...

Nov 17, 2011 | 2004 Dodge Neon

2 Answers

My 02 chevy cavalier turns over but will not start. I have replaced ever thing i know that could be wrong.


does it produce fire does the gas pressure rise does the crank sensor and cam sensor work

Feb 09, 2011 | Chevrolet Cavalier Cars & Trucks

2 Answers

I have a 93 Eagle Talon with good fuel pressure and no spark


could be crank & cam sensor if they do not meet in sinc they will not get spark

Nov 13, 2009 | 1993 Eagle Talon

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