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My cali ev is making backfires and sometimes works on one cylinder. Changed both coils but still does the same,any solutions

Changed coils,plugs

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  • Motorcycles Master
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You do not say what vintage it is so hard to advise much. Try new properly gapped spark plugs first off, then check ht leads, make sure coil primary is not reveresed,and the ignition grounding is good.

Posted on Dec 11, 2014

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Posted on Jan 02, 2017

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1 Answer

Back firing under a load. what the valve setting on the intake and exhaust.


there is detail missing here that is essential for a solution
what engine is it , v or straight, no of cylinders
what work has been done prior to the problem
what ,make and model, year of vehicle
you have changed spark plugs so assuming it is a v8 I would be rechecking the firing order of the HT leads ( 2 cylinders crossed )
They will start and idle ok but backfire under load

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I have a 1996 dodge grand caravan,v6 3.8L .it keeps pulling the code(random misfire). I've changed the coil pack,did a full tuneup(plugs,wires,fluids,all of it.and it still keeps misfiring when I first...


misfires are more from faulty injectors / leaking injectors so check the codes as the misfire code will indicate the problem cylinder
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make sure all cylinder working fine the best way to check make the car start
tray to remove spark plug coil cable if something wormg direct so that mean its fine if not and same engine is going mean that this coil should be changed
hope u get me
if above are fine
so might be from oxygen sensor is not functioning well

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If the two dead cylinders are close together,then the head gasket may have blown out in between them.See if the timing has jumped.If it has a coil pack,the the coil pack may not be firing the two dead cylinders.

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The first thing I would do is replace the spark plugs again. You can foul a plug and it will cause you more problems than you can ever imagine. I see you have done all the logical things that I would recommend but I did not see you have replaced the plugs after the 200 miles. You would be surprised at how many times a $2.00 part can cause fits beyond belief.

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1 Answer

Tyres and pressures


The Cali' Special tyre pressures:- --------------- 1 RIDER.---------------------- 2 RIDERS Front ...... 2.3 Bar(33.5psi) ................... 2.3Bar(33.5psi) Rear ....... 2.5Bar(36.3psi) .................... 2.9Bar(42psi) I use BT45's on mine but I have the ordinary tubed rims. I find the ride harsh but this may be down to suspension rather than tyres. People recommend running the BT45 at a slightly higher pressure than the book. I got 8500 miles from the front and 4700 from the rear. Although the rear was changed slightly early due to a puncture. I will probably try a different make next time.

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