GM Longroof Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.



 
HomeHome  PortalPortal  GalleryGallery  Latest imagesLatest images  SearchSearch  RegisterRegister  Log in  

 

 Misfire! 307 V8

Go down 
5 posters
AuthorMessage
kameron m




Posts : 37
Join date : 2016-08-04
Location : South Bend Indiana

Misfire! 307 V8 Empty
PostSubject: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeFri Sep 09, 2016 10:50 pm

Hello,
Had my electra tuned up recently... gah. the bill was a little steep at the end. Then again, they also had to do new wheel studs for it and some exhaust work that I didn't really want to do. Nonetheless. Seems like though the engine tuned up a lot nicer, my exhaust smells pretty rich, and i've got a misfire on cyl #7. Mechanic thinks the valve is stuck. Plugs are new. Dizzy is new. Spark is good. Carb is good. Ideas?
Back to top Go down
Andebe

Andebe


Posts : 3323
Join date : 2013-02-20
Age : 55
Location : Centerville, IN

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeSat Sep 10, 2016 9:58 am

Replace the 307? scratch Maybe find a 403,350? I will watch for your go fund me page. Smile
Back to top Go down
kameron m




Posts : 37
Join date : 2016-08-04
Location : South Bend Indiana

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeSat Sep 10, 2016 2:01 pm

F!
My buddy in cleveland has a rebuilt rocket 455...
Back to top Go down
fixitman333

fixitman333


Posts : 30
Join date : 2015-10-08
Age : 50
Location : Philly PA

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeFri Sep 23, 2016 9:58 am

did you replace the wires?
Back to top Go down
kameron m




Posts : 37
Join date : 2016-08-04
Location : South Bend Indiana

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeFri Oct 21, 2016 7:30 am

So I think I found the problem. Q jet float bowl leaked and sank or something like that, and will readily flood the engine, especially at low rpms with a load, which the lock up clutch transmission is good at administering, and the super rich mixture started fouling the plugs.

So last night, 500 miles from home, I did a full spark plug change on the beastie in the holiday inn parking lot after the misfire got so bad that the car was undrivable, with my cell phone as a flashlight and a couple of duralast socket extensions and u joints. Man, those plugs were suuuuuuuuper duper easy to get to. It was so eassssy.

I don't care what people say about rochester Q jets. If anyone wants that p.o.s. I'll give it to you for shipping price only and you can rebuild it.

I'm getting an Edlebrock.
Back to top Go down
Rev Bob




Posts : 499
Join date : 2016-05-24

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeFri Oct 21, 2016 7:55 am

How many miles/years of service on the Quadrajet?
Back to top Go down
kameron m




Posts : 37
Join date : 2016-08-04
Location : South Bend Indiana

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeFri Oct 21, 2016 8:27 am

160000 miles, original 1987. I'm just not going to bother rebuilding it, I'm getting a better carb. Also, I'm ticked off. Hehheh
Back to top Go down
kameron m




Posts : 37
Join date : 2016-08-04
Location : South Bend Indiana

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeSat Oct 22, 2016 5:10 am

drove 500 miles with the buiack sputtering, misfiring, bogging down like a tired ol' thing, changed the spark plugs halfway through to make her run semi-right again and made it home just as the misfiring started hitting hard. Poor thing. Went through 24 spark plugs this trip. Turned carb cleaner lid upside down on the last run and they did last ~100 miles longer.
Back to top Go down
Fred Kiehl

Fred Kiehl


Posts : 7283
Join date : 2009-11-13
Age : 76
Location : Largo, FL 33774

Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitimeSat Oct 22, 2016 9:13 pm

If you get a 4 barrel manifold, you can put Fitech TBI fuel injection on it...put the 455 in it first. Injection system is about $799 (for up to 400 HP). You can run a Walbro 255 pump.
Back to top Go down
Sponsored content





Misfire! 307 V8 Empty
PostSubject: Re: Misfire! 307 V8   Misfire! 307 V8 Icon_minitime

Back to top Go down
 
Misfire! 307 V8
Back to top 
Page 1 of 1
 Similar topics
-
» misfire problem
» Figured out my intermittent misfire
» Misfire & codes ALOT...

Permissions in this forum:You cannot reply to topics in this forum
GM Longroof Forum :: Longroof Tech :: Engine-
Jump to: