GUYS HELP! Still backfiring

[oldhotrod]

Ever time i get on it, it backfires.I fixed all the vacum lines it blew last BIG backfire.Fuel press ok.Have one of TT chips 63 Turbo, Razor alk .cold air.212/212.3200 from Dusty.Big neck cooler.worked iorn heads.full posi.scac master.full gauges hi volt.new bushing all around.air bags But it is still backfiring. HELP BeFORE I BLOW IT UP
jerry

 

[Heg87t]

Have you checked the ground wires on the head to make sure they are tight?
Have you verified that the posative battery cable is not hitting on the downpipe or grounding out anywhere else during acceleration?
Are all the intercooler hose connections tight?

Any Scanmaster or Powerlogger data?

 

[jasjamz]

Backfire out of the tailpipe or popping out of the intake?

 

[WIKEDV6]

Is it a flat tappet cam? if so maybe a lobe gone south. Any way try a different coil/ module first!!

HTH
Prasad

 

[jasjamz]

Start it, unplug the cam sensor and go for a spin. see if the problem goes away.

 

[turbogus]

backfiring

it took us two weeks to figure out that one wire from the maf wasent making connection to the computer and my car was also backfiring at 3000 rpm

 

[87NAT]

Check your plug wires.

 

[oldhotrod]

where did you find the broken wire?

 

[cork]

Does it backfire if the Alky is turned off ?

 

[need boost]

also reach down and check you cam sensor, mine did it one time and the bolt had backed off letting it turn and get the timing off.

 

[84BuickGNYorkPA]

Also check your crank pulley center bolt, if that gets loose it will rub the crank sensor and it will backfire, happened to me. Also had the positive battery cable rub against the header and burn through, causing backfire, as stated in post above this one.

Chuck

 

[sscamino]

I had 1 of the screens in the MAF come loose and only on acceleration bounce off the sensor inside and would pop.