It drive me crazy, I got multi-misfiring P0300. WHAT can be wrong ?
the car got low compression and i got the head job done. now compression are good . The problem still haven't solve. One more thing it would die if i don't press the gas. it idle very rough and cut off it self. i'm new here please help.... i been looking around this site and i can't anything that help. thanks
The spark plugs,wires,and cap are new . Timing definitely right i'm 100% sure. I've tested the spark, it got very strong blue spark. That mean the Coil inside the distributor is ok . when i rev the engine to 3000RPM for a while , i can feel the engine skip. The injectors are good i opened and check them too. The car idle poorly and die hot or cold. From what i know if a car misfiring . It probaly shaking and idle poorly. The engine won't die that easily . Can it be the cam Sensor ? Is there a way to check it ?
I will guess maybe crankshaft snout worn, search crankshaft snout when you click on search at the top of the page. jtgh (an expert on this forum) will dis-agree with my test, but it's worked for me and others here with no problem. Advance your timing to about 18 degrees instead of 5-8 degrees and drive it enough to see how it acts. Tracka96
NO Luck on Advance timing.
I tested the Camshaft wire (White) from the distributor With Key on engine crank the volt about 5V as the shaft turn pass it break magnetic field of the CMP sensor the volt is 0.1V. It seem the sensor is Ok . Any expert comfirm this please....help me out
When i track that wire into the ECU D3 . The wire only 2.6V and with cranking engine it jump 2.7V-3V . My wire Diagram showing the wire run straing from the Ditrubutor to the ECU . It get me confuse . It should reading the same as above but it not. I even cut the D3 wire (White) near the ecu . I start the engine and it run. How it get signal to run when the CMP wire is cut . CMP sensor wires are blue/black = Volt, black/Blue = injector ground and white = cmp sensor
my head are limited and again any expert help me i really preciate thank...
Last edited by kkiepvvessau : 07-23-2008 at 10:12 PM.
remember p0300 , is not always spark,
p0300 says random misfire, (not specific cylinder)
in english,
it really means:
randomly , there are cylinders that do not produce full power.
the cranks slows when the plug fires , is the detection rules.
your car is automatic tranny and the engine is diff on them and the ecu , and wiring.
your is everything in dizzy , versions.
cmp /cas, ignitor , etc.
so the dizzy is bad, or igniter or the coil.
here is print.
many cars can run with one of of the cam sensors dead.
not sure this car.
__________________ http://carfix.stufftoread.com/
click me.
91'-8v,2dr,4wd,Conv. Market#E03
My server has Engine Repair proc/data. Check it out.
but loss , pulley and bad key way , makes cams wiggle like crazy and
could cause misfire, in fact that is how misfire is detected .
the misfire, is detected by the ECU predicting how quickly the crank accelerates at each fire. if the next tdc actual is later then expected, it sets misfire.
if all 4 cyl. do this, it is p0300
not p0301 ....304
torque crank end nut to 94ft/lbs.
or measure current torque with beam bar torque wrench.
hope its just a bad coil , igniter
cheers.
__________________ http://carfix.stufftoread.com/
click me.
91'-8v,2dr,4wd,Conv. Market#E03
My server has Engine Repair proc/data. Check it out.
but loss , pulley and bad key way , makes cams wiggle like crazy and
could cause misfire, in fact that is how misfire is detected .
the misfire, is detected by the ECU predicting how quickly the crank accelerates at each fire. if the next tdc actual is later then expected, it sets misfire.
if all 4 cyl. do this, it is p0300
not p0301 ....304
torque crank end nut to 94ft/lbs.
or measure current torque with beam bar torque wrench.
hope its just a bad coil , igniter
cheers.
The crank pulley hold by 5 6mm bolt and the Crank cam for timing belt is hold by the 17 mn socket. i'm pretty sure the Bolt is tight . What is The " Dizzy" that you guy talking about? i read somewhere too but the picture link is down. thank for the wiring diagram . I got those too.
I'm pretty sure the coil ok. When the coil Malfunction it either die or work when it cold . When it get hot it will act up .
Last edited by kkiepvvessau : 07-24-2008 at 01:21 AM.
remember p0300 , is not always spark,
p0300 says random misfire, (not specific cylinder)
in english,
it really means:
randomly , there are cylinders that do not produce full power.
the cranks slows when the plug fires , is the detection rules.
your car is automatic tranny and the engine is diff on them and the ecu , and wiring.
your is everything in dizzy , versions.
cmp /cas, ignitor , etc.
so the dizzy is bad, or igniter or the coil.
here is print.
many cars can run with one of of the cam sensors dead.
not sure this car.
cam sensor i think this car have only one and it in the Distributor assembly.
97 sidekick please help . !!!!!
Linear Mode
