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Thread: Backfiring and detonation problem Reply to Thread
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  Topic Review (Newest First)
08-07-2019 08:56 AM
Strelok re-tuned STPS and TPS sensors, backfiring almost gone, but detonation is still here
08-01-2019 04:40 AM
Strelok I cleaned all the fuel system again, cleaned the tank and filter, installed new injectors, performance is better, but still same problems, sometimes it backfires on low trottle, has detonation. And sometimes it keeps the engine on high rpm on neutral, like it is cold, but it is not. Any thoughts?
07-25-2019 11:31 PM
Volkeno I had a problem with backfiring a few years ago and I believe all I did was install a new air filter. The backfiring only happened for me when the engine was warm. I have a 2003 with carbs instead of fuel injection, so it may be different.
07-23-2019 11:48 PM
Strelok
Quote:
Originally Posted by Psyc0 View Post
The machine starts/runs, but runs poorly, with backfiring and detonation.
More likely a fuel issue, because an extremely lean fuel condition will cause the problems that You are experiencing.
If the ignition/spark was the issue, the machine would probably not run at all.
The main question if it is like this, why it starts only when it is hot?
07-22-2019 12:46 PM
Psyc0 The machine starts/runs, but runs poorly, with backfiring and detonation.
More likely a fuel issue, because an extremely lean fuel condition will cause the problems that You are experiencing.
If the ignition/spark was the issue, the machine would probably not run at all.
07-22-2019 09:54 AM
Strelok
Quote:
Originally Posted by Psyc0 View Post
Next question:
Did You make certain to adjust the front & rear valves on the correct crankshaft rotations?
Yes
07-22-2019 08:03 AM
Psyc0 Next question:
Did You make certain to adjust the front & rear valves on the correct crankshaft rotations?
07-21-2019 11:19 PM
Strelok
Quote:
Originally Posted by Psyc0 View Post
Did You only turn the crankshaft counter-clockwise, or did You use clockwise motion, when performing the valve adjustment?
counter-clockwise only as I remember
07-21-2019 02:02 PM
Psyc0
Quote:
Originally Posted by Strelok View Post
Yes, We did it like in manual. Things got worse after that I think... I have a lot of rust in my tank, I will try to clean it on this week

Did You only turn the crankshaft counter-clockwise, or did You use clockwise motion, when performing the valve adjustment?
07-21-2019 09:08 AM
Strelok
Quote:
Originally Posted by Psyc0 View Post
Have the valves been adjusted recently?
Yes, We did it like in manual. Things got worse after that I think... I have a lot of rust in my tank, I will try to clean it on this week
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