Chevy 350 not running the same - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Chevy 350 not running the same

Smittybilt Products at Oconee Off-Road!Alloy USA Still AvailableCurrie Currectlync Steering Upgrade Kits and Currie Anti-R

Reply
Unread 09-16-2011, 07:10 AM   #1
usmarine3521
Registered User
2000 TJ Wrangler 
 
Join Date: Feb 2011
Location: Jacksonville, North Carolina
Posts: 420
Chevy 350 not running the same

Few days ago my buddy came over and said my engine was running rich and idle was too high. So he did a little tinkering and it sounded better. But now when I'm idling the jeep vibrates and almost sounds like it's pulsating. Also I used to go a whole week and a half without having to fill up and now I'm in empty within four days. Anyone have any insight as to what is going on. It is a chevy 350 sb in a 84 cj7

Sent from my iPhone using JeepForum

usmarine3521 is offline   Reply With Quote
Unread 09-16-2011, 08:08 AM   #2
Foundrydude
Registered User
1995 ZJ 
 
Join Date: Jan 2011
Location: Flatsville, IA
Posts: 2,692
Vacuum leak or ignition issue like sticking advance mechanisms. Also be sure the choke isn't staying on. When fixed you'll have to undo whatever "tuning" was done to try and cover the symptom.

good luck
Foundrydude is offline   Reply With Quote
Unread 09-16-2011, 10:03 AM   #3
Cutlass327
Web Wheeler
 
Cutlass327's Avatar
1978 CJ5 
 
Join Date: Jan 2009
Location: Massillon, Ohio
Posts: 5,070
Either that or he just made it worse. Tell him to come back over and undo whatever he did, and explain to you what he is doing. If you lost MPG from his tuning, but yet you were 'rich' before, I don't think it is a stuck choke or anything.

I would go over the vacuum lines though, and check it for a stuck EGR valve and such. Cut a piece of pop can the size of the EGR base, loosen the bolts, and slip it under the EGR valve, then retighten the bolts. This will block it off for testing purposes..
__________________
Rick

1978 CJ5 258/T177/D300, '86 D30/D44 WT axles, 'glass tub windshield frame, and fenders, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy

http://www.jeepforum.com/forum/f8/ri...8-cj5-1223197/
Cutlass327 is offline   Reply With Quote
Unread 09-16-2011, 12:31 PM   #4
usmarine3521
Registered User
2000 TJ Wrangler 
 
Join Date: Feb 2011
Location: Jacksonville, North Carolina
Posts: 420
Quote:
Originally Posted by Foundrydude
Vacuum leak or ignition issue like sticking advance mechanisms. Also be sure the choke isn't staying on. When fixed you'll have to undo whatever "tuning" was done to try and cover the symptom.

good luck
Well I noticed that the electronic choke isn't connected.

Sent from my iPhone using JeepForum
usmarine3521 is offline   Reply With Quote
Unread 09-18-2011, 01:02 PM   #5
Foundrydude
Registered User
1995 ZJ 
 
Join Date: Jan 2011
Location: Flatsville, IA
Posts: 2,692
Hook the choke up.

An electric choke without a wire will still allow the choke blade to move with the carburetor temperature. Meaning when temps drop at night the choke will apply. Then the choke will stay on til the carburetor body warms up enough to disengage the choke, which is about 10X as long as if the wire is hooked up to the choke's internal heating element.
Foundrydude is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.