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99 toyota solara rough idle in park and neutural

Replaced water pump and timing belt afterwards started up an timing was off a tooth on 1,3,5 cam it was backfiring took apart again and set number 1 cylinder tdc matched it with crank and second cam all looks great now! but rough idle in park when car reaches operating temp.check engine says missing on 1,3,5 new wires and plugs new amf sensor new cam sensor checked coils seem fine ohm 1.2 on all three coils took out fuel injectors seemed very dirty I cleaned with carb cleaner an reinstalled also not sure if this means any thing but transmission is not downshifting on passing gear in low or high speed sometimes it kicks in and sometimes it doesn't what do you think? could it be timing still?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: buick lesabre nightmare

Need to get a scan tool and look at the data stream while it is running for alot more info.Also any trouble codes.Sounds like initially,the engine isn't getting any fuel.I would have a pressure gauge connected to the fuel rail on the engine,so i could monitor the fuel pressure while all this is going on.Items to look at on the data stream would be timing,what timing is the PCM commanding for the engine.Also,have you checked for continuos power feed to the coils during this no start condition,and fire at the plugs while cranking.You could possibly still have spark,but maybe it is extremely weak?I have seen bad ignition switches cause weird problems before too.Many things power up through the ignition switch,just a thought.Have also seen bad PCM's cause strange problems..38 volts is a little on the low side for GM.Usually see those at,at least .50 and up,and rise steadily while pressing the throttle,up to just under 5.0 volts.Potentiometer with 5 volt supply.Vacuum leak can be checked with engine running at a steady idle speed,spray brake cleaner all around the intake manifold and listen for engine speed change.

Posted on Jul 31, 2008

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SOURCE: buick lesabre no start

Hi you have replaced allmost everything ,(try fuel pump relay)

Posted on Aug 18, 2008

michigan man
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SOURCE: engine idles rough, misses at 2500-3000 rpm's

i would first check the timing and if that does not fit i would take the cover back off and look at the belt for a bad or missing tooth

Posted on Feb 14, 2009

  • 150 Answers

SOURCE: rough running, erratic spark

Run a compression test on the cylinders.If reading is low on any drop a little engine oil into the pot. If compression rises you have compession ring problems. Remove all plugs before you try this and place leads away from engine.

Posted on Mar 04, 2009

  • 53 Answers

SOURCE: 1999 grand cherokee laredo 4.0 and auto trans wont downshift

The Transmission Control Module also turns on the check engine light. However the parts store won't be able to read these codes since all they read are the Engine DTC's. More then likely your codes will come back to a Governor Pressure Sensor and/or Switch. If they do then remove the pan and replace both of those. Simple fix, should be able to be done in about an hour or so. Might as well go ahead and slap a speed sensor in while you're under there. Should be able to do it yourself for less then $200.

Posted on Dec 20, 2009

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They will make a hollow rattle sound whenever you hit bumps or uneven pavement.

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i would first check the timing and if that does not fit i would take the cover back off and look at the belt for a bad or missing tooth

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