backfiring from start up

Asked by Panda Mar 14, 2016 at 03:07 PM about the 2000 Honda Civic Coupe Si

Question type: Maintenance & Repair

Replaced tsp. Now the car backfires as soon as u start it
up. It started up as cutting out around 2000rpms to 3500
and a missin here and there at higher rpms. Found out it
had a low current tps code so i replaced it. Wen i installed it
incorrectly it ran fine til the 2000-3500 range. I finally got
the right readings then it did perfect til i hit about 4500 and
started missing bad and backfired. The car shut down  now
as soon as it starts up its backfiring. Its a b20z2 with ls
tranny swap

2 Answers
4,045

gearheadRHINO answered 8 years ago

this could be down to a number of things dodgey sparking plug, injector down, or the cabutrator out of alignment. could also be caused by lack of compression on one cylinder

Mark helpful
220,935

Rowefast answered 8 years ago

All these symptoms you just describe would cause a miss, not a back fire. There is a timing or fuel issue going on here. There is no carburetor on this.

Mark helpful

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