Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > TBI
Register Forgot Password?

TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 08-13-2010, 07:30 AM   #1
Member
 
92FBirdVert's Avatar
 
Join Date: Jul 2010
Location: Goodland, IN
Posts: 206
Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73

Classifieds Rating: (1)
1992 Firebird 305 TBI hesitation/surging while accelerating slowly??

Ok I have a 1992 firebird with a 305 tbi, the car has 175,000 miles and I've noticed that my car has a slight surging feeli to it while slowly accelerating, I changed the TPS but still does this what could this be?
__________________

***************************************************
Convertible= When a T-Top just isn't good enough!
1992 Pontiac Firebird V6-sold
1992 Pontiac Firebird convertible 305
1998 Ford Mustang Cobra SVT
2007 Chevy Silverado SB 5.3 V8
92FBirdVert is offline vBGarage Page   Reply With Quote
Old 08-13-2010, 08:10 AM   #2
Supreme Member
 
Join Date: Jul 2009
Location: Chicago, IL
Posts: 1,311
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW

Classifieds Rating: (3)
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??

1. Check for codes, never replace anything without knowing its really faulty.

2. Setup a fuel pressure tester and see if fuel is the problem.
__________________
1986 Pontiac Firebird. LT1/4l60e.
Quality isn't cheap. Remember that.
Carlos773 is offline vBGarage Page   Reply With Quote
Old 08-13-2010, 08:58 AM   #3
Member
 
92FBirdVert's Avatar
 
Join Date: Jul 2010
Location: Goodland, IN
Posts: 206
Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73

Classifieds Rating: (1)
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??

Quote:
Originally Posted by Carlos773 View Post
1. Check for codes, never replace anything without knowing its really faulty.

2. Setup a fuel pressure tester and see if fuel is the problem.
I dont have a check engine light on, but do you think it could still throw a code?
Also what are some ways to check your fuel pressure?
__________________

***************************************************
Convertible= When a T-Top just isn't good enough!
1992 Pontiac Firebird V6-sold
1992 Pontiac Firebird convertible 305
1998 Ford Mustang Cobra SVT
2007 Chevy Silverado SB 5.3 V8
92FBirdVert is offline vBGarage Page   Reply With Quote
Old 08-13-2010, 09:48 AM   #4
Supreme Member
 
RFmaster's Avatar
 
Join Date: Jan 2007
Location: OC CA
Posts: 1,804
Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"

Classifieds Rating: (0)
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??

Quote:
Originally Posted by 92FBirdVert View Post
I dont have a check engine light on, but do you think it could still throw a code?
Also what are some ways to check your fuel pressure?
Stock TBI system does not have FP test port. You can install inline FP gauge adapter available from several vendors:

<IMG>http://cfm-tech.com/images/product/tbiadapterandpsigauge_s.jpg</IMG>


Stock TBI system runs around 13PSI but I have seen engines run as low as 9 PSI. Anything less than 10-11 PSI you'll get stumbles and less than spirited performance. With miles that you have on you car it is likely that you have OE Fuel pump. Ninety percent of the time fuel pump is tired and output section hose connecting FP to the gas tank feed through is leaky.

Start with fuel pressure test....

//RF
RFmaster is offline vBGarage Page   Reply With Quote
Old 08-13-2010, 10:23 AM   #5
Supreme Member
 
Join Date: Jul 2009
Location: Chicago, IL
Posts: 1,311
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW

Classifieds Rating: (3)
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??

Quote:
Originally Posted by 92FBirdVert View Post
I dont have a check engine light on, but do you think it could still throw a code?
Also what are some ways to check your fuel pressure?

I purchased one from Autozone and its perfect, part number is CP7817. Its $50 but can save you the time and money of going around replacing parts that don't need to be replaced. Also yes it can throw codes without the light coming on, do the paper clip method and extract the codes and maybe that can shed some light on what might be going on.
Carlos773 is offline vBGarage Page   Reply With Quote
Old 08-13-2010, 10:40 AM   #6
Member
 
92FBirdVert's Avatar
 
Join Date: Jul 2010
Location: Goodland, IN
Posts: 206
Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73

Classifieds Rating: (1)
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??

Quote:
Originally Posted by Carlos773 View Post
I purchased one from Autozone and its perfect, part number is CP7817. Its $50 but can save you the time and money of going around replacing parts that don't need to be replaced. Also yes it can throw codes without the light coming on, do the paper clip method and extract the codes and maybe that can shed some light on what might be going on.
Ok I'll try that and see what happens
__________________

***************************************************
Convertible= When a T-Top just isn't good enough!
1992 Pontiac Firebird V6-sold
1992 Pontiac Firebird convertible 305
1998 Ford Mustang Cobra SVT
2007 Chevy Silverado SB 5.3 V8
92FBirdVert is offline vBGarage Page   Reply With Quote
Old 08-13-2010, 10:40 AM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > TBI

Tags
1992, 305, 92, codes, engine, firebird, hesitation, long, mpg, pontiac, read, start, surging, tbi, wont
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 03:58 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details