After multi misfire changing spark plugs and wires and all 3 coils still running bad. motor is shaking. got code p1190. cant figure it out. please help.
Multi misfires can be from injectors --dirty and not squirting properly or low fuel pressure ---fuel pump or dirty filters
plugs are only half of a misfiring problem and the injectors are always left out
Next time include all details like make, model , year of car in your question to get a better answer
Testimonial: "im so sorry its a 2000 toyota sienna.thank you so much."
could be a fuel pressure regulator malfunction which goes to low fuel pressure which causes misfiring
go google and type in fault code p 1190 for toyota sienna 2000 and there are pages that may give you a clue to the problem
remember that the code will be the same for any number of makes in toyota and will reflect the same problem area
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SOURCE: Random Misfire on 2 & 3
I had a problem with a chevy with random misffires on all cylinders. It was the computer. Fords have very few problems with there computers. Does the check engine come on? Maybe have it scanned.
SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4
ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.
SOURCE: check engine light, on and running rough
This misfire is most likely due to bad injectors. Check injector pulse with a NOID light. If pulse is good you need new injectors. However before you do all of this get a compression guage and check compression on all cylinders. The numbers shouldn't be more than 10 psi difference in all cylinders for example if cylinder# 1= 160 psi cyl#2=168 that's good but if cylinder#3= 176 and 4=179 there is a problem with 1&2. bad valves or bad head hasket etc. Good luck and thanks for using FIX YA.
SOURCE: 2000 toyota 4runner pulling a random misfire in
try a new crankshaft sensor not hard to change 2 bolts and a wire
SOURCE: I have a PO302 code
I would think your next step would be the coil pack, and i would suggest you get one at an auto wrecker just in case that is'nt the problem. Most electrical parts are non refundable.
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