car backfired

[poh_86]

hey guys i was driving my car last night and i was cruising 70kmph and my car started feeling jerky throwing itself back and forth and the rpm was going whack jumping from 3,000 to 2,000 then 1,000 then back upto 3

then suddenly my car backfired like a firecracker. can anybody help me find out what it is?

thanks guys greatly appreciated

[genkin]

did you drop a cracker in your engine?

is it 4age?
could be fuel surge, maybe check your fuel pump.
check all earths and your battery is connected properly.

[SprinterTRD]

If Its a 4ac the capacitor in the distributor may be playing up

[poh_86]

forgot to mention its 4ag bigport

[SprinterTRD]

Standard ECU?

[poh_86]

yup

[SprinterTRD]

If you have a engine check light connect the T & E1 terminals together to see if there are any error codes flashing.

Could be something with the igniter, distributor, power to the ECU in other words lots of things could cause the same problem

[riceburner]

Timing belt,dizzy have jumped a few teeth. Maybe keyway on the crankpulley.

Check timing first, simply because its easiest.

Cheers

Steve

[poh_86]

ok ill get that checked out tmr

it happened again but not backfire

i was taking off normally 1st gear reved to 3 grand then it jolted and jumped like asif it was gonna die then came back up fine again.

if that helps contribute to anything?

[dori_86]

could it be blocked fuel lines or filter?

[driftism]

check the coil... sounds like a similar problem i had on my escort, i replaced the coil and it was fine...

[verm69]

yeah, sounds like an ignition problem... check your spark plugs...???

http://www.ae86drivingclub.com.au/forums/emoticons/dry.gif

[Joel-AE86]

maybe its the flux capacitor?

These can sure be pricey!

What fuel do you run?

[dori_86]

nah man, it would be his haltec extractors and Kuhmo exhaust that would be the problem http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif

[poh_86]

dori_86: i replaced the fuel filter about 3,000km ago and dont you mean motec exhaust system? (dodgey fast & furious lines) or it could be the mis firing system i stole from lan evo3 initial d http://www.ae86drivingclub.com.au/forums/emoticons/tongue.gif

4age - 86: im was also guessing it was the coil

VeRm69: i replaced spark plugs 3,000km ago as well

Joel-AE86: always run optimax

[toyoda]

man im having the same problem atm !

car is un driveable, have replaced fuel filter, spark plugs etc etc, checked that the o2 is still alive and many more things

gonna see if the head gasket has gone tonight do a quick compression test.

[poh_86]

hmm i might look into that one too,
but im pretty sure its the coil or ignitor

iif it is the gasket, its another good excuse to go 4-1 hehe

[toyoda]

pretty sure we have fixed mine, it was the TPS

[willy86]

but what did u do to fix the tps, mine does it too but no1 knows what setting to set the tps at

[toyoda]

it wasnt my settings it was the connector

[poh_86]

found the problem, the wires that ran from relay were burnt by the exhaust manifold and also the battery was overcharging on the alternator, and burning the ignition which smoked up my cabin and screwed my coil

fried wires is bad,

car is getting reconditioned alternator

i warn anyone to get their voltage checked out

NOT HAPPY =\

[omy]

Well you found the issue so it will not happen.........