1995 Chevy Caprice intake backfire

9CLT1

MEMBER
1995 CHEVROLET CAPRICE
V8
2WD
AUTOMATIC
122,000 MILES

I have replaced plugs, opti spark, mass air flow, computor, and o2 sensors but still have a back fire comming from the intake air filter. This hapens at a high rmp. Also idels rough and has no power like a lt1 should. The drivers side old plugs were black but passengers side were good. I do see some improvement since the opti and plugs were changed but still that darn back fire from the air filter.

Sunday, December 23rd, 2007 AT 8:05 PM

3 Replies

GENUINE1D

MEMBER
9 POSTS

I had the same problem, Try changing the cap and rotor.

Was this

answer

helpful?

Yes

No

Sunday, December 23rd, 2007 AT 9:52 PM

RASMATAZ

MECHANIC
75,992 POSTS

Go back to index

Inbox : Message
From: 9clt1
To: rasmataz
Posted: Sun Dec 23, 2007 11:25 pm
Subject: air filter back fire
i have replaced plugs, opti spark, mass air flow, computor, and o2 sensors, fuel filter but still have a back fire comming from the intake air filter. Intake bolts are tight, exhast is tight. This hapens at a high rpm. Also idels rough and has no power like a lt1 should. The drivers side old plugs were BLACK but passengers side were good. I do see some improvement since the opti and plugs were changed but still that darn back fire from the air filter is still there. Could the cat be bad. No check engin light on.
1995 chevy caprice. LT1. 9C1. 5.7L
122.500 miles
HELP!

Could be a problem with excessively rich or lean mixture. Sparkplugs with wrong heat range, excessive carbon/hot valves and Ignition timing

Also have the throttle position sensor and fuel pressure check-look for vacuum leak

Was this

answer

helpful?

Yes

No

Sunday, December 23rd, 2007 AT 11:39 PM

9CLT1