Car has terrible idle, boggy, and bad throttle response. (VIDEO INSIDE!) - MustangForums.com


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-25-2013, 12:19 AM   #1
lavertue
Thread Starter
 
Join Date: Jul 2012
Location: Florida
Posts: 20
Default Car has terrible idle, boggy, and bad throttle response. (VIDEO INSIDE!)

Titles says it all, car has bad idle, boggy acceleration, and stalls out when I slow down fast. Also has terrible throttle response. Checked iac and it was working. Checked alternator and battery, they were good. Vacuum lines are all good. Fpr is good. I'm not sure what else to check. It has been running bad like this for a little while now. I just installed my new Walbro 255lph fuel pump and thats when it started doing this "surging" type deal. If anyone has any ideas on what to check, please let me know. Thanks again, LaVertue.


VIDEO
lavertue is offline   Reply With Quote
Old 02-25-2013, 09:22 AM   #2
mustangsneverdie
5th Gear Member
 
mustangsneverdie's Avatar
 
Join Date: Oct 2007
Location: Georgia
Posts: 2,624
Default

first thing I would check would be the check engine light, to see what codes you have
mustangsneverdie is offline   Reply With Quote
Old 02-25-2013, 09:54 AM   #3
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,741
Default

check codes, check for vaccum leaks next and make sure there is no fuel pressure bleed down
mjr46 is offline   Reply With Quote
Old 02-25-2013, 02:41 PM   #4
mattdel
6th Gear Member
 
mattdel's Avatar
 
Join Date: Nov 2006
Location: Spfld, MA
Posts: 9,240
Default

Did you disturb or otherwise mess with the orange cap on the end of the return line when you installed the pump?
mattdel is offline   Reply With Quote
Old 02-26-2013, 08:14 PM   #5
lavertue
Thread Starter
 
Join Date: Jul 2012
Location: Florida
Posts: 20
Default

How do I check the computer? I don't believe you can get it checked at Advanced Auto correct? And Mattdel, I did not mess with it. Thanks for the help guys!
lavertue is offline   Reply With Quote
Old 02-26-2013, 08:47 PM   #6
rbowmar
2nd Gear Member
 
Join Date: Jun 2012
Location: Littleton, Colorado
Posts: 247
Default

Yes, you can check your codes at most auto parts shops. Do you have fuel pressure in your fuel rails? That can help check all the different problems that can bedevil your fuel supply. I don't know if they loan them, but I bought a cheap one 5 years ago and it has saved HOURS of chasing possible fuel supply problems.
rbowmar is offline   Reply With Quote
Old 02-26-2013, 10:59 PM   #7
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,741
Default

Quote:
Originally Posted by rbowmar View Post
Yes, you can check your codes at most auto parts shops.
maybe obd 2 equipped cars, but there isn't a vatozone I've ever goNE TO THAT KNOWS WHAT A KOEO/KOER test is for a ford much less has a scanner to run one. Heck you're lucky if they can even find the plug under the hood.
mjr46 is offline   Reply With Quote
Old 02-26-2013, 11:03 PM   #8
lavertue
Thread Starter
 
Join Date: Jul 2012
Location: Florida
Posts: 20
Default

Quote:
Originally Posted by mjr46 View Post
maybe obd 2 equipped cars, but there isn't a vatozone I've ever goNE TO THAT KNOWS WHAT A KOEO/KOER test is for a ford much less has a scanner to run one. Heck you're lucky if they can even find the plug under the hood.
Yeah, I've realized that the people who work at auto parts stores don't know a thing about cars, very annoying. However, I tried to run the test myself with the paper clip and the plug under the hood, I couldn't get my car to flash the codes. Any ideas?
lavertue is offline   Reply With Quote
Old 02-27-2013, 01:01 AM   #9
lavertue
Thread Starter
 
Join Date: Jul 2012
Location: Florida
Posts: 20
Default

I'm not sure if this is it, but I may be a complete idiot. I ruled out the one thing it may be without even testing it, the TPS Sensor. So I headed to the garage and popped the hood, and gave it a go. Well, I'm not even getting any reading on my meter. So, I figured maybe I wasn't getting power to it at all, but I pulled the plug out and tested the power supply and I'm getting power, just the sensor isn't registering that I'm getting anything when i test it that way. So I guess that means it must be bad I'm assuming? I'm going to go tomorrow and get a new one and see if that resolves the issue. I'll keep you posted.
lavertue is offline   Reply With Quote
Old 02-27-2013, 07:50 AM   #10
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,741
Default

^^^^make sure when backprobing it: 1. your tapped into the correct wires and 2. your probes are making contact
mjr46 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
03 GT Chirping on Throttle msavoia23 4.6L (1996-2004 Modular) Mustang 11 08-21-2015 12:05 PM
Groaning noise coming from rear when turning right 92 5.0stang 5.0L (1979-1995) Mustang 4 08-13-2015 07:46 AM
FORD FRENZY!!! Milan Dragway-September 12th Milan Dragway Members Rides and Car Show Section 0 08-12-2015 04:43 PM
Torque Bias explained... ccwebb GT S197 General Discussion 2 08-11-2015 07:47 PM
Need Help Diagnosing Have Codes (Confused) djbigskrilla 2005-2014 Mustangs 13 08-11-2015 01:59 PM


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

Forum Jump


All times are GMT -5. The time now is 01:57 AM.