backfires!!

flipper · 12-30-2004

Ok, more?s on the timing. I put the #1 piston at TDC and when I looked at the distributor with the cap off, the hash mark on the rotor is about 7 or 8 mm past the hashmark on the distributor housing clockwise. I have the car idling well and accelerating well, but when I decelerate it has little backfire noises in the exhaust. Do you think the backfires are because its retarded, or advanced, and wich way should should i turn it to cure it, clock or counter clock. Thanks all.

madhatterpdc · 12-31-2004

What kind of exhaust do you have? If you have a stock exhaust in good shape and you are making that noise, then it is either a timing or a mixture issue. Any exhaust that is free-er flowing will have a little bit of popping on downshifts and throttle lifts

greensmurf20 · 12-31-2004

if its just a cackle and pop out the exhaust no worries, but if its backfires sounding like the neighbors shotgun then worry. you said no muffler just rear resignator right? my car does the same thing, sounds pretty good in my own opinion, and i'm sure many others out here have the cackle on the drop of RPMs.

Willy_g77 · 12-31-2004

yeeper.. i have a stock exhaust.. and it pops every now and then(not very loud).. and it crackles when you push the clutch in..(letting off the gas while going down the road)...

12-30-2004	#1 (permalink)
flipper opel assimilated Join Date: Oct 2002 Location: springfield mo, was chicago Posts: 141	Unanswered: backfires!! Ok, more?s on the timing. I put the #1 piston at TDC and when I looked at the distributor with the cap off, the hash mark on the rotor is about 7 or 8 mm past the hashmark on the distributor housing clockwise. I have the car idling well and accelerating well, but when I decelerate it has little backfire noises in the exhaust. Do you think the backfires are because its retarded, or advanced, and wich way should should i turn it to cure it, clock or counter clock. Thanks all. __________________ "and James Dean thought he had a lil' Bastard!"

12-31-2004	#2 (permalink)
madhatterpdc 1450 Seeker... Join Date: Jun 2003 Location: Cape Cod, Mass Posts: 631	What kind of exhaust do you have? If you have a stock exhaust in good shape and you are making that noise, then it is either a timing or a mixture issue. Any exhaust that is free-er flowing will have a little bit of popping on downshifts and throttle lifts __________________ Keep it Blitzed

12-31-2004	#3 (permalink)
greensmurf20 OPEL-LESS!!! Join Date: Mar 2003 Location: Gobles michigan 49055 Posts: 2,112	if its just a cackle and pop out the exhaust no worries, but if its backfires sounding like the neighbors shotgun then worry. you said no muffler just rear resignator right? my car does the same thing, sounds pretty good in my own opinion, and i'm sure many others out here have the cackle on the drop of RPMs. __________________ previousely owned 8 GTs and 1 manta. currently own 92 25th anniversary Z28. Ttop, 350, T56 swap, many upgrades, basically a complete restore. 67 chevy sportvan deluxe....next in line.

12-31-2004	#4 (permalink)
Willy_g77 Senior Contributor Join Date: Jul 2003 Location: Casey, IL USA Posts: 611	yeeper.. i have a stock exhaust.. and it pops every now and then(not very loud).. and it crackles when you push the clutch in..(letting off the gas while going down the road)... __________________ {)BILLY(} & The 71' GT 73 manta luxus real cars don't power the front wheels...... they lift 'em

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