Question about Cars & Trucks
The tip of the plugs turned black.. Its like it has been burnt on the tip.the seems to be ok..also the wirings.. Is it still too lean? What are the possible damage?.is there any damage on d engine?
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Posted on Jan 02, 2017
The backfiring on deceleration is typically associated with a loose timing chain.
If you put a wrench on the harmonic balancer bolt, turn the balancer gently until you feel the chain tighten, then rotate the opposite way until it tightens, how far does is move.
If it goes more than an inch, it is getting sloppy. If it moves closer to 2 inches, it is worn out.
Try that first then let me know and we can go from there.
Posted on Apr 08, 2009
SOURCE: hesitates on acceleration
Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.
I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.
If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.
I hope this helps! -Nick
Posted on Apr 10, 2009
Nornally reson for backfire is when intake Valve open Internal combustion in Cylinder. Pls Check Your Ignition Timing & Valve Timing. ( I think Your Timing Advancer is Defect )
Posted on Jun 01, 2009
SOURCE: bmw 3.0 x5 hesitation problems
sound like throttle position sensor.have it check out.also check air duct connected to mass air flow sensor and throttle body.if air duct is loose or off.it will cause severe hesitation.
Posted on Jul 22, 2009
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