Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> TBI 350 Idle issues...again...
User Name
Password
lost password?   |   register now

Thread: TBI 350 Idle issues...again... Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
05-24-2011 05:27 PM
shane.,herold
ground

my battery cable goes to block, 1 from body to frame, body to engine and the one that was hanging came out of one of the looms back there. not sure what it goes to
05-24-2011 04:10 PM
ted200008
lol

make sure u got a good ground from the battery to the motor. then one from the motor to the firewall which is the one u hooked back up. and there should be one more from the frame to the body. bad ground can cause alot of wierd issues.
05-24-2011 02:51 PM
shane.,herold wel, when closing the hood in the dark while the truck was running, i noticed some small sparks jumping from the header to a dangling itty bitty ground wire out of a loom by the bell housing. I hooked it up and the truck now purrs like a kitten. And my winshield wipers work again. I have been fighting this problem on and off for a YEAR!! one tiny little wire should not be sooo important for my truck to run right. Thinking i need to make sure there arent any other ones not connect making this one relied upon too much.
05-24-2011 12:33 AM
ted200008
egr

check your egr valve. even though its brand new. it may be sticking open. this would cause it to run fine except at idle or low rpm.
05-24-2011 12:18 AM
shane.,herold yes i disconnected the wire to set timing, and anyone that says you can only go 4 degrees is wrong. I have ran anywhere from 0 to 16 and the truck ran fine at all. I keep it just over 10 and it is snappy this way.

i replaced the TBI base gasket today. All of the calibrating on the link is good information, but highly unnecessary. A quick disconnection of the battery cable and a couple start ups for it to learn itself and it will run fine. My problem is about 60% of the time. I can put the idle screw anywhere and the IAC will make it idle fine. when it dies it will fire right back up and run fine for awhile.
05-23-2011 08:03 PM
SSBlazer When you set the timing did you disconnect the EST connector. It should be on 0 but you can go up to 4
05-23-2011 06:44 PM
oldbogie
Quote:
Originally Posted by shane.,herold
1994 K1500 tbi 350 280,000 miles. 8,000 on new engine

wants to lope and die at idle.
new egr
new iac
new dist.
new pcv
rebuilt TBI
new knock sensor
new computer
tried all kinds of base timing levels

i am thinking it could be fuel pressure? (replaced pump 40,000 miles ago)
worn throttle shafts?
TPS?
Some even say oil pressure switch. I replaced when i put new engine in.

i am at my wits end with this thing.
Read this:

http://www.gmcmidwestclassics.org/We...0the%20TBI.pdf

Did you follow this proceedure?

Bogie
05-23-2011 05:42 PM
shane.,herold
TBI 350 Idle issues...again...

1994 K1500 tbi 350 280,000 miles. 8,000 on new engine

wants to lope and die at idle.
new egr
new iac
new dist.
new pcv
rebuilt TBI
new knock sensor
new computer
tried all kinds of base timing levels

i am thinking it could be fuel pressure? (replaced pump 40,000 miles ago)
worn throttle shafts?
TPS?
Some even say oil pressure switch. I replaced when i put new engine in.

i am at my wits end with this thing.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 04:59 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.