back firing 4ALC - Toyota Nation Forum : Toyota Car and Truck Forums

Dicipleofthelie · 08-29-2005, 09:46 PM

soo yeah, my car has the 4ALC carb motor, and it back fires like crazy on deceloration

ive heard that this can be caused by too rich of a setting, but i think i have mine set lean a touch. my dad thinks its the flowmaster muffler i put on it "its a tunner muffer that does nothing for the car" also my dad is an asshole.

i think its burned valves, any guesses?

92MX83 · 08-29-2005, 10:27 PM

I've never had a backfiring problem before, but I've had mad jdm tyte dorifto detonation when accelerating uphill with both previous 4A-LC Corollas I've owned. The Nova has been pretty well-behaved, but it's about as fast as grass growing. Have you tried fiddling with the timing?

What's the mileage on your car, disciple?

Dicipleofthelie · 08-29-2005, 10:29 PM

heh, no the timing is fine, been checked several times

the head and body has 315K miles
the engine has like....100K maybe?

Dicipleofthelie · 08-29-2005, 10:30 PM

the head has 315K miles, which leads me to believe that i have burned valves

92MX83 · 08-30-2005, 03:49 AM

Oooo...

Fortunately for you, there were a couple of remanufactured 4A-LCs on ebay for $250, last I looked.

Not that you'd wanna do that, of course...

20V time!

Dicipleofthelie · 08-30-2005, 01:10 PM

no kidding, i really wana do that...but later

Flashmn · 08-30-2005, 01:41 PM

if its a popping sound, chances are its the muffler. You should of heard my nissan without the rear muffler (fell off)

Dicipleofthelie · 08-30-2005, 01:43 PM

eh the muffler is relatively new, about a year or so, but could it be that the muffler is just not right for the car?