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 Chevy & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-08-2010, 01:26 PM   #1
Strutter
Registered User
 
Strutter's Avatar
 
Join Date: Jun 2007
Location: Statesville,NC
Posts: 11
intermittent sputter under acceleration

My '88 350 TBI started sputtering under acceleration a few weeks ago. was acelerating up an on ramp and if i pushed the petal down to get up speed it would sputter. felt like a backfire without the noise. i could give it a little petal and it would not sputter. first thing that crossed my mind was fuel filter. so i changed it. it ran fine for aproximately 100 miles. then i was at a store one day and when i got in to leave it started sputtering again. so i figuered maybe the tank was so dirty that it clogged the filter again. so i changed it again. it ran fine for about another 100 miles. then today i drove it to the park to walk my dog it ran fine there. when i got back in it to leave it was sputtering again. i got it home, parked it, got my daughters car and bought another fuel filter. when i got back i was going to put it up on a ramp but it was running fine. so i took it for a little spin. ran fine.

so anyone have any ideas.
__________________

1957 Chevy 3100
1988 Chevy Silverado

Strutter is offline   Reply With Quote
Old 02-08-2010, 03:15 PM   #2
JWall
Senior Member
 
JWall's Avatar
 
Join Date: Aug 2009
Location: Tulsa, OK
Posts: 1,806
Re: intermittent sputter under acceleration

My 98 recently had a bad miss at cruising speeds but idled fine.
It would miss badly between 1500-2000 RPM's...and I mean badly.
It was the plug wires.
__________________
- Justin
76 SWB C-10 - 98 SWB C1500 (x2)
1 Owner 1976 SWB
JWall is offline   Reply With Quote
Old 02-09-2010, 12:59 PM   #3
ChevLoRay
Old Skool Club
 
ChevLoRay's Avatar
 
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
Re: intermittent sputter under acceleration

Sounds like time to start checking a little deeper into the fuel delivery system.

There are numerous posts on here that will help you check pressures under several different conditions.
__________________
Member Nr. 2770

'96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed.

'69 C-10 SWB; 350/TH400 - under reconstruction.

The older I get, the better I was.
ChevLoRay is offline   Reply With Quote
Old 02-09-2010, 02:00 PM   #4
89muscletruck
Registered User
 
89muscletruck's Avatar
 
Join Date: Apr 2009
Location: Edmonton, Alberta
Posts: 271
Re: intermittent sputter under acceleration

Just after I bought my 94, it started behaving just like what you are describing. I replaced the fuel filter, it seemed to run better, but the problem kept comming back. In the end it turned out to that the sparkies were fouled up, one sparkie had deposits that completly filled the spark gap.
89muscletruck is offline   Reply With Quote
Old 02-09-2010, 09:16 PM   #5
sean1969c10
Registered User
 
sean1969c10's Avatar
 
Join Date: Mar 2008
Location: Powhatan, Va.
Posts: 328
Re: intermittent sputter under acceleration

I'm pretty sure I am having the same problem with my 88 GMC. I had the timming light on it a few nights ago and it would pick up a miss now and then. I'm going to replace the wires as soon as the snow melts!!

Sean

Last edited by sean1969c10; 02-09-2010 at 09:17 PM. Reason: spelling
sean1969c10 is offline   Reply With Quote
Old 02-10-2010, 03:52 AM   #6
tonyp56
Registered User
 
Join Date: Jan 2010
Location: Stillwater Oklahoma
Posts: 86
Re: intermittent sputter under acceleration

Don't know if it helps but my 88 350 TBI had bad hesitation if you gave it gas quickly would die if you didn't let off, acted like it was getting flooded. Would do that in park or reverse/drive too. However, if you slowly pressed down on the gas pedal, it would do fine. Check engine light was on so I checked and I had a code 22, TPS low signal voltage. Changed out my TPS (throttle position sensor) (Along with checking 5 volt from ECM, it was good, but the connector was bad on old TPS so it wouldn't allow the plug to be fully inserted) and now it runs like a champ. Have read that you may or may not have a check engine light. Might want to check yours to see if all is good. My Haynes book has test procedures, so wouldn't think it would be hard to find it and check into it at least. New TPS only was $28.xx at Autozone.

Last edited by tonyp56; 02-10-2010 at 03:53 AM.
tonyp56 is offline   Reply With Quote
Old 02-10-2010, 08:28 PM   #7
packers05
Registered User
 
Join Date: Feb 2009
Location: minonk illinois
Posts: 224
Re: intermittent sputter under acceleration

my experience tells me to tell you that the fuel pump and pump harness should be changed

Last edited by packers05; 02-10-2010 at 08:29 PM.
packers05 is offline   Reply With Quote
Old 03-12-2011, 11:53 PM   #8
hotrodman_crg
Registered User
 
Join Date: Mar 2011
Location: Gibsonia PA
Posts: 1
Talking Re: intermittent sputter under acceleration-my solution

My 1988 chevy 1500 pick up was doing the same thing, but it got worse and worse until it was undrivable. It would start up fine idle decent but if you gave it gas even in park, it would cut out and stumble like either it was running out of fuel or losing spark. It turned out to be the spark. At first I suspected fuel, changed fuel filter... no change, checked fuel pressure... 13 lbs perfect, so... not fuel. Started looking at electronics, checked the MAP sensor... good, checked the TPS sensor... questionable... changed & re-checked TPS... good but no change in motor running, changed cap and rotor... no change, changed coil... no change, tried a new coil wire... no change. I then decided to look into the distributor, removed the ignition module and took it to the parts store to get it tested... heres where I learned something... when I was removing the module i noticed that the plug going into the distributor shaft was "sticky" and not really whole anymore, it turns out that the ignition coil pick-up was bad, and was shorting out my ignition module. The crappy part of replacing that coil pick-up, is that you have to pull the distributor out and dismantle it. I reassembled the distributor with the new pick-up and new ignition module, put it all back in and reset the timing, and so far so good. Runs great! Good luck!
hotrodman_crg 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 -5. The time now is 08:36 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com