Search



Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang
Sign in using an external account
Register Forgot Password?
Search

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.

Sponsored by Weld Racing


Welcome to Mustang Forums!
Welcome to Mustang Forums.

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, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 02-13-2014, 09:42 PM   #1
antnvlz1294

 
Join Date: Nov 2013
Vehicle: 1988 ford mustang
Location: new jersey
Posts: 14
Exclamation having some issues...

Hey guys heres another fun thread.
So as you all already know I currently own a 1988 mustang 5.0 lx. I bought the car back in november and I've had multiple issues. I currently have a misfiring issue so I was told to replace multiple things. I would get a misfiring/popping sound from my vehicle under a load and would feel like I am losing power until the car would catch up and speed up the misfiring ended. I replaced the fuel filter, sparkplugs (motorcraft gapped at .052), ignition wires (autolites), MSD Cap and rotor, MSD Ignition coil, Oil & filter change, Did a 3g alternator upgrade to a 130 amp alternator(kit bought from latemodelrestorations.com) with a bigger gauge wire that goes from the alternator to the ignition system, cleaned out the Iacv(looks brand new and had no carb build up in it at all so I believe that the previous owner knew about the issue), tested the TPS and it was at a .97 so it checked out good, I replaced the tfi ignition module(made no difference) so I was told I couldve been the pip sensor in the distributor. I just replaced the distributor about 2 weeks ago and when I did I made sure the #1 cylinder was top dead center and made sure the rotor was pointed toward the number 1 cylinder/sparkplug and installed the distributor. Then my neighbor(builds cars for atco raceway here in sj) used a timing light and set my timing to 12 degrees. After the new distributor (the brand is Tough One?) was installed I noticed that the car actually now bucks/jerks forward if i stay at a steady/constant speed. For example if I drive 25 mph for a while it'll buck/jerk forward a couple of times until I increase acceleration. Although this problem doesnt occur if I accelerate or am sitting at a light in neutral. After all of that work, the misfiring issue is still present, although it did seem to go away for a day or two after the distributor install. About a week ago I installed 6 new speakers and a new headunit correctly, and last night when I turned on my headlights, I noticed another problem now. The headlights were flickering and so was the lite up dashboard. The battery gauge on the dashboard itself was bouncing up and down as well(not giant bouncing but bouncing up and down as fast as the flickering). I've never had this issue before and it hasnt gone away since last night. It cant be the aftermarket headunit or speakers because this problem just began to happen and theyve been in for a week already. The negative and positive cables arent loose either so what could be the problem? The car still misfires/pops and bucks/ jerks forward at a constant speed and now I have this issue on top of it. I am really about to bash my head through a wall... I've only had the car almost 3 months now... and it didnt seem to have these issues the first few weeks i've had it... please help me...? :banghead:

Thanks guys..
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
antnvlz1294 is offline   Reply With Quote
Old 02-14-2014, 06:43 AM   #2
88 orangepeel notch
4th Gear Member
 
88 orangepeel notch's Avatar
 
Join Date: Mar 2010
Vehicle: 1988 notchback
Location: Wisconsin
Posts: 1,788
Default

When you tested the TPS, did you do a sweep test to look for dips/spikes in voltage readings? And you checked all your grounds?
88 orangepeel notch is offline   Reply With Quote
Old 02-14-2014, 12:06 PM   #3
antnvlz1294

 
Join Date: Nov 2013
Vehicle: 1988 ford mustang
Location: new jersey
Posts: 14
Default

Quote:
Originally Posted by 88 orangepeel notch View Post
When you tested the TPS, did you do a sweep test to look for dips/spikes in voltage readings? And you checked all your grounds?
No spikes/dips in readings it was steady just going from .96 to .97 I believe and I dont know all of my ground locations? I see one near each headlight, one near the battery from the negative cable and one on the drivers side firewall to the engine.

Also i just went to advanced auto to get a system check. The battery test: Good Battery. Voltage: 13.02v, Measured: 654 CCA, Rated: 540 CCA, Temperature 59F "Battery Meets or Exceeds Required Standards". The Starter test: Cranking Normal: Voltage 10.52V, Amps: 0.0A, Time: 1.12S. The Charging System Test: Results: No Problems, No Loads: 14.99V, Loaded: 14.64V, Ripple: 88mV. Charging system output test normal.
antnvlz1294 is offline   Reply With Quote
Old 02-14-2014, 02:22 PM   #4
antnvlz1294

 
Join Date: Nov 2013
Vehicle: 1988 ford mustang
Location: new jersey
Posts: 14
Default

Just used my actron obd1 code scanner. On the KOEO test I got system pass. On KOER test however, I got code 41. Code 41: Exhaust Gas Oxygen (EGO) sensor: Voltage Signal always "Lean" (low value) - does not switch. This wouldnt have anything to do with my whole bucking/ jerking forward, dashboard and head light flickering and battery gauge jumping issue would it?...
antnvlz1294 is offline   Reply With Quote
Old 02-14-2014, 05:05 PM   #5
mattdel
6th Gear Member
 
mattdel's Avatar
 
Join Date: Nov 2006
Vehicle: 1986 LX, 87 GT Hatch, 89 GT Vert
Location: Spfld, MA
Posts: 9,240
Send a message via AIM to mattdel
Default

Cruising speed misfires/bucks are usually a result of a vacuum leak induced by the EGR system. O2 reading lean would seem to concur.
__________________
mattdel is offline   Reply With Quote
Old 02-17-2014, 12:17 PM   #6
antnvlz1294

 
Join Date: Nov 2013
Vehicle: 1988 ford mustang
Location: new jersey
Posts: 14
Default

Quote:
Originally Posted by mattdel View Post
Cruising speed misfires/bucks are usually a result of a vacuum leak induced by the EGR system. O2 reading lean would seem to concur.
Well I went to put a 4 gauge wire from where the negative battery cable mounts to on the engine to the ground next to the battery, and It didnt reach so I took it back but they didnt have a longer wire. Instead I bought a 4 gauge negative battery cable(same as the original) the only bad thing about it is that its 78 inches long which is too long causing me to ziptie and electrical tape a bunch of it together.. anyway I put that on and the car started right up and the battery gauge stopped bouncing and the dash and headlights didnt flicker the rest of the day. Today however I started my car and those issues are back... what do I do now? I had everything tested under load and posted the results above^ so its not the alternator... Maybe the battery then? do I need a bigger and better battery? I have a cheaper one its "pro start"... as for the bucking, my car didnt start doing that at a constant speed until I installed the new distributor...? About the egr what does that mean>?
antnvlz1294 is offline   Reply With Quote
Old 02-17-2014, 12:17 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

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

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 09:27 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup