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> 1990 gmc starts but dies in gear
User Name
Password
lost password?   |   register now

Thread: 1990 gmc starts but dies in gear 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)
11-26-2012 07:23 AM
dsraven start with the basics, compression test, leak down test, condition of spark plugs-black is rich mixture, plug wires, timing, vacuum lines, battery cables and terminals, positive connection at starter and ground connections at engine and body, also ground points in the wiring harness, pcv valve operation and the port that it connects to at the tbi (they are known for plugging up there), does the engine pick up rpm or drop rpm when the pcv valve is removed? make sure both injectors are pulsing a nice uniform cone spray into the tbi, check the timing as you rev it up to see that it does advance with rpm, make sure the rockers are all moving about the same (ensures you don't have a lobe gone off the cam).check for a plugged muffler or catalytic converter- do a vacuum test where you rev the engine up for a couple of minutes as you check to see if the vacuum goes down slowly. check at the exhaust pipe to see if it is black when it dies-too much fuel. check the fuel pressure in the inlet side of the tbi, maybe the regulator is shot. I had one that did this and it was actually the ecm. another one I did it was the ignition module.
like the guys say, give us as much info as you can so we can troubleshoot it without seeing it. what does it do when it stalls, is it like it is starving for fuel or does it does it run like you have the choke pulled out too far on a carbed engine-kind of lopey? does it black smoke out the exhaust and slowly die? does it stall quicklyas soon as it is placed into drive, like you dropped the clutch at idle in a standard shift truck, ? what have you checked already? have you tried cleaning the idle air control air passage or removed the idle air control motor and checked the pintle and seat for build up? have you removed and cleaned the throttle body and all the passages under it, like for the pcv valve port? have you checked the base timing with the timing connector unplugged and then with the connector plugged in to see if you are getting advance from the ignition module? have you checked for too much timing chain slack or has it maybe skipped a tooth on the timing set? turn the engine over by hand backwards about half a turn or whatever until it comes up on the timing marks. take the distributor cap off and make a mark on the distrubutor housing with a piece of tape or a crayon where the rotor is pointing to. then, while watching the igntion rotor, turn it over by hand the other way and note how many degrees the crank has to turn until the rotor just starts to move.that will give you an idea of how much timing chain slack you have. how many miles on the engine? has it been sitting around for awhile and now you are working with stale fuel? did it start this all of a sudden? if it did, did it start with some backfiring or anything specific?
hope this helps. keep us posted.
11-26-2012 06:38 AM
Greg T Can you give it throttle and drive it or is that impossible? Is it going to die regardless of the throttle position?
11-26-2012 12:16 AM
smokingtires Well it starts just fine and it will rev through the rpms in nutural but as soon as its put into gear the rpms go down real low and the engine dies if he even tries to pull forward unless he rides the brake and keeps the rpms up but even then it dies fairly quick
11-25-2012 09:59 PM
techinspector1
Quote:
Originally Posted by smokingtires View Post
hey every one i have a question for you guys agian, my buddy has a 1990 gmc jimmy fuel injected 350. He has been having some issues with it and i cant think of what it can be now we have replaced cap and rotor fuel pump and strainer and fuel line filter. There are no check engine lights coming on and im stumped any advice on what it could be? thanks everyone
Explain the "issues" and someone on this board will be sharp enough to give you the correct answers.
11-25-2012 09:40 PM
smokingtires
1990 gmc starts but dies in gear

hey every one i have a question for you guys agian, my buddy has a 1990 gmc jimmy fuel injected 350. He has been having some issues with it and i cant think of what it can be now we have replaced cap and rotor fuel pump and strainer and fuel line filter. There are no check engine lights coming on and im stumped any advice on what it could be? thanks everyone

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 06:03 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.