The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-02-2018, 08:36 PM   #1
Andrij
Registered User
 
Andrij's Avatar
 
Join Date: Sep 2005
Location: Copperas Cove, TX
Posts: 36
Stumped... What do you TBI guys think

Hi I got the truck rebuilt the TBI changed out all sensors & vacuum lines, gas pump & filter, I wanted a great start! & for a month it wanted to run! 70mph was definately not a problem at just over 2000 rpm!
Then it started to not want to start. Ignition coil & new distributor & reset the truck with a timing light. Any time I work on it I have the new battery recharged the night before so I feel like I have a good base.
After the distributor & coil it had problems starting, & idling. It runs rough, dies alot. Last time I took it out it wanted to spudder & die off like it had no gas. I would push the gas & wait at first it wants to die, & then (if it doesn't die) at the last moment struggle to give power.
Appreciate any thoughts, just frusterated that it isn't running right.
Oh ya distributor isn't name brand. O2 sensor wasn't changed but everything else I got from AC Delco or Delphi.
Andrij is offline   Reply With Quote
Old 12-02-2018, 10:43 PM   #2
ChevyTech
Registered User
 
Join Date: May 2004
Location: Minnesota
Posts: 4,620
Re: Stumped... What do you TBI guys think

Did you have the set timing connector unplugged when you set the timing?
__________________
For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
ChevyTech is offline   Reply With Quote
Old 12-03-2018, 09:38 AM   #3
sntrym95
Registered User
 
sntrym95's Avatar
 
Join Date: Jan 2006
Location: Big Pine Key, FL
Posts: 743
Re: Stumped... What do you TBI guys think

It could be a lot of things, but if it were mine I would check the coolant temp sender (http://67-72chevytrucks.com/vboard/s...d.php?t=425788) and the throttle position sensor first, as well as the timing connector like ChevyTech suggested.
__________________
Mike
sntrym95 is offline   Reply With Quote
Old 12-03-2018, 02:53 PM   #4
Kudzupatch
Registered User
 
Kudzupatch's Avatar
 
Join Date: Apr 2013
Location: GUNTERSVILLE
Posts: 621
Re: Stumped... What do you TBI guys think

We are all guessing but sounds like mine when one of my injectors stopped up.
Kudzupatch is offline   Reply With Quote
Old 12-03-2018, 07:43 PM   #5
Andrij
Registered User
 
Andrij's Avatar
 
Join Date: Sep 2005
Location: Copperas Cove, TX
Posts: 36
Re: Stumped... What do you TBI guys think

sntrym95 is right, turned out being the coolant sensor, I bought it & didn't install it
Thanks sntrym95 what auto parts store you go to?
Andrij is offline   Reply With Quote
Old 12-04-2018, 11:21 AM   #6
sntrym95
Registered User
 
sntrym95's Avatar
 
Join Date: Jan 2006
Location: Big Pine Key, FL
Posts: 743
Re: Stumped... What do you TBI guys think

I go to a local AutoValue-affiliated store. For electronics/sensors I try to stick with Standard brand as they make a lot of OEM stuff and are generally reliable.
__________________
Mike
sntrym95 is offline   Reply With Quote
Old 09-30-2021, 01:24 PM   #7
Andrij
Registered User
 
Andrij's Avatar
 
Join Date: Sep 2005
Location: Copperas Cove, TX
Posts: 36
Re: Stumped... What do you TBI guys think

I would like to also add the distributor as a culprit
Simply because Cheap Chinese Manufacturing even if you pay more for a name brand
Went through 3 new ones, & Distributor #3 was in there during that problem. The truck was hard to start, fuel milage was always crap, & wouldn't **** into OverDrive & the dash PRND321 Light wouldn't come on. All that changed with the 4th Distributor.
PS
The second new Distributor I spent more on & didn't run at all, & the first one was an Amazon cheapo that didn't work right. Inferior parts, the struggle is real y'alls!!!!
Andrij is offline   Reply With Quote
Old 09-30-2021, 03:15 PM   #8
Mr_Rich
Registered User
 
Mr_Rich's Avatar
 
Join Date: May 2006
Location: Santa Maria, Calif.
Posts: 781
Re: Stumped... What do you TBI guys think

I try to stick with parts made in North America. US, Canada, and Mexico seem to have better quality control than China. A lot of the Chinese parts I've bought look close but don't work right. I used to install Accel dist caps and rotors for my tune-ups until they were made in China. They might look similar but they sure didn't fit like the Made in Canada part I was used to. Chevrolet parts made in China just doesn't seem right, does it?
__________________
1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M (sold)
1997 K2500 Chev. EC 7.4L/ 4L80E
2018 Dodge Ram 2500 HD R/C
Mr_Rich is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 09:58 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com