carb pops when idling and accelerating

gunslinger8200 · 04-29-2002, 04:17 PM

i put new heads on my 302 and now when idling the carb pops occasionally, but when i give it gas it really pops a lot. it stops popping when i get it to about 3 1/2 grand. I tried the timing and a diff. carb so far, I thought the valves were all set right, but I dunno. any suggestions would be appreciated

slow98 · 04-29-2002, 08:34 PM

what kind of motor? bigger intake might help

gunslinger8200 · 04-29-2002, 10:13 PM

its a stock 302 from a 85 mustang i think. I think my intake should be big enuf

PKRWUD · 05-01-2002, 05:08 PM

Could be a bad power valve, too. I'd readjust the valves first. If you have an intake valve that's hanging open, it will cause an intake backfire. Check your compression, and if you have a low cylinder, check those valves first.

Take care,
-Chris

04-29-2002, 04:17 PM	#1
gunslinger8200 Registered Member Join Date: Feb 2002 Location: Wisconsin Posts: 7	carb pops when idling and accelerating i put new heads on my 302 and now when idling the carb pops occasionally, but when i give it gas it really pops a lot. it stops popping when i get it to about 3 1/2 grand. I tried the timing and a diff. carb so far, I thought the valves were all set right, but I dunno. any suggestions would be appreciated

04-29-2002, 08:34 PM	#2
slow98 Registered Member Join Date: Apr 2001 Location: draper,va,us Posts: 206	pop pop what kind of motor? bigger intake might help __________________ 1998 mustang gt/manual..373s,bbk offroad h pipe,flowmaster cat back,c&l 80 mm maf,steeda triax,eibach springs,steeda ud pulleys,upr timing adjuster,screamon demos coil packs,motorsports 9mm plug wires,steea aluminum lca's,steeda heavy duty uca's and just over 100 k on the clock

05-01-2002, 05:08 PM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Could be a bad power valve, too. I'd readjust the valves first. If you have an intake valve that's hanging open, it will cause an intake backfire. Check your compression, and if you have a low cylinder, check those valves first. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

04-29-2002, 10:13 PM	#3
gunslinger8200 Registered Member Join Date: Feb 2002 Location: Wisconsin Posts: 7	its a stock 302 from a 85 mustang i think. I think my intake should be big enuf