[84REGAL87]

1987 buick regal
olds v8 307

had heads done a year ago, you know-
new spark plugs wires and dist cap.

now it is backfiring from carb.
slight loss of power, then back to regular, then backfire again.
i see the splash marks on inside of air filter housing.

 

[Icemanrandy]

Have you rebuilt the carb?

 

[84REGAL87]

yes they did that also

 

[Icemanrandy]

how many miles on the motor now?

 

[RO Sleepy]

bad gas?

bad carb?

 

[taylorswanted]

timing issue maybe , may have jumped a tooth , my old monte did it only it shot flames out the carb

 

[Chris]

usually if its backfiring out of the carb its probably the distributor is out 180 degrees or to far advanced or retarded one of the two

 

[concrete]

Originally posted by Chris@Aug 31 2005, 01:44 AM~3724808
usually if its backfiring out of the carb its probably the distributor is out 180 degrees or to far advanced or retarded one of the two

yea, turn the rotor...

or get a timing light and do it right.

 

[harborareaPhil]

IF THE CARB WAS REBUILT..TAKE IT BACK...HAD SAME PROBLEM

 

[ja-keem]

take off the valve covers and inspect the push rods and rocker arms

 

[SolidGoldCaddy]

Originally posted by ja-keem@Aug 31 2005, 04:46 PM~3728101
take off the valve covers and inspect the push rods and rocker arms

what the fuck for?

its timing, done.

 

[Foompla]

Originally posted by SolidGoldCaddy@Aug 31 2005, 08:08 PM~3728625
what the fuck for? 

its timing, done.

if the intake valve lash is too tight it will backfire out of the carb.

 

[Foompla]

:0

 

[BLVDCRUISER]

so if the lash is to tight its cracking the intake valve open?

 

[Chris]

if they are too tight it just won't run

 

[Foompla]

Originally posted by BLVDCRUISER@Aug 31 2005, 09:31 PM~3729163
so if the lash is to tight its cracking the intake valve open?

if its too tight, the valve is being prevented from closing all the way.

 

[BLVDCRUISER]

well that plausable..but i doubt it..id say the carb is goofed up or the timing is off or its one of the quadracrap electronic metering rod carbs and u should just take it off and throw it at ur enemy

 

[Foompla]

Originally posted by Chris@Aug 31 2005, 09:39 PM~3729249
if they are too tight it just won't run

well, one time i was replacing my intake gaskets at 1 am- somewhat unconciously i might add. and for some reason i tightened one of the valves. when i went to start it up, it ran like shit and when i revved it up it backfired otu the carb. moral of my shitty story -


dont work on your fuckign car when your asleep :biggrin:

 

[84REGAL87]

Originally posted by Icemanrandy@Aug 30 2005, 08:38 PM~3723516
how many miles on the motor now?

LIKE, 140,OOO

I GOT TO MY "BOOK" TODAY, IT SAYS:

1)emissions systems not functioning right.
2)ignition timing incorrect
3)carb in need of adjustment or worn.
4)vacuum leak at carb, intake manifold or hoses.
5)valve lash incorrectly set, and or valves sticking.

SO I'LL SEE WHAT I CAN DO.

RESPECT FOR THE INPUT.

 

[concrete]

Originally posted by Foompla@Aug 31 2005, 06:50 PM~3729372
well, one time i was replacing my intake gaskets at 1 am- somewhat unconciously i might add. and for some reason i tightened one of the valves.  when i went to start it up, it ran like shit and when i revved it up it backfired otu the carb.  moral of my shitty story -
dont work on your fuckign car when your asleep :biggrin:

or high...