Car surges while driving HELP - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 11 (permalink) Old 04-10-2012 Thread Starter
PONY Member
 
GTDanny's Avatar
 
Joined: Dec 2009
Location: Blythewood
Posts: 309
 
Car surges while driving HELP

I have a 2007 GT and I've been running a Brenspeed 93 octane tune for about 2 years now with no problems... I recently changed my spark plugs with HT1 spark plugs at 55000 miles... and it seems since then I get a little bit of surging in 4th and 5th gears and a little more surging in 1st and 2nd, more so when cold. And sometimes it seems like to misses...The car runs great when driving harder..... It has never given any codes. I really wonder if something has happend or damaged to the coils when the plug swap was done..It seems like all the coils are snapped into the plugs.... Is this common????? any ideas????????????? thanks

oh, the TB, MAF and the filter have been cleaned....

2007 GT
GTDanny is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 04-10-2012
PONY Member
 
dynobrat's Avatar
 
Joined: Nov 2010
Location: Town
Posts: 616
 
say it slowwwwww. it's your allllllternaaaaatOR lol

seriously. Last year my car did EXACTLY what you are describing, no codes etc, worked great. I never thought anything of it. Just thought it was the fan turning on. (I drove it all last fall and it was doing it with no cause or understanding why, just shrugged it off as minor)

Brought it out this spring, check engine light, p0340, put a new alternator on, it doesn't surge at all, I drove it a few hours tonight and it's smooth as butta all the time. I'd wager your alternator is slowly going out.

And yes, my car would do it cold as well, as soon as I put my foot down just a little bit to get me moving it would jump/surge and then be fine for a bit and then every now and then it would do it less severely but still noticeable. I doubt it's related to your plug swap, I am just offering some insight because it sounds 100% identical to what I was going through. My car doesn't surge at all now.
dynobrat is offline  
post #3 of 11 (permalink) Old 04-11-2012 Thread Starter
PONY Member
 
GTDanny's Avatar
 
Joined: Dec 2009
Location: Blythewood
Posts: 309
 
Really?????? Wouldn't I see the volt gauge moving little and or a noise from the alternator or some kind of sign of defect??????

2007 GT
GTDanny is offline  
post #4 of 11 (permalink) Old 04-11-2012
Site Sponsor
 
Brenspeed's Avatar
 
Joined: Jul 2005
Location: North Webster
Posts: 1,713
 
My guess is the alternator as well. Had it happen on quite a few cars in here and teched a few of these over the phone and most of the time it ends up being the alternator.

Brenspeed Staff
Brenspeed Mustang Performance
Located in Indiana & Texas
Installation Facility - Mail Order
Phone: 574.594.9559
Roush Top 10 Dealer and Authorized Installer
FRPP/Paxton/Vortech/E-Force
3V & 5.0L Turn Key Supercharger Packages!
Brenspeed is offline  
post #5 of 11 (permalink) Old 04-11-2012
PONY Member
 
dynobrat's Avatar
 
Joined: Nov 2010
Location: Town
Posts: 616
 
Quote:
Originally Posted by GTDanny View Post
Really?????? Wouldn't I see the volt gauge moving little and or a noise from the alternator or some kind of sign of defect??????

My alternator was failing and the gauge showed the same position as it does now with a new alternator. The gauges are not real-time data and cannot be taken at face value. Also, in my situation, there were no odd or unusual noises coming from it.
dynobrat is offline  
post #6 of 11 (permalink) Old 04-11-2012 Thread Starter
PONY Member
 
GTDanny's Avatar
 
Joined: Dec 2009
Location: Blythewood
Posts: 309
 
Quote:
Originally Posted by Brenspeed View Post
My guess is the alternator as well. Had it happen on quite a few cars in here and teched a few of these over the phone and most of the time it ends up being the alternator.
So does anyone know what the alternator is doing or what is causing the surge??? Voltage? Amperage?....... I thought i saw somewhere it could have happend when the battery was changed... I have changed the battery a few months ago....

i have a 87/89 tune that seems to NOT "DO IT" as bad... It's worse with the more aggressive Brenspeed 93 tune.... Why so????

Thanks, Danny

2007 GT
GTDanny is offline  
post #7 of 11 (permalink) Old 04-11-2012
PONY Member
 
dynobrat's Avatar
 
Joined: Nov 2010
Location: Town
Posts: 616
 
the thing is though, is why waste your time trying to understand something that you can never figure out? There is a spike or interruption in the current, which results in the surge. The timing is advanced on a higher octane tune, which is why you may notice it more. I'm not an expert this is just a guess.

It's really not worth your time to try and understand it, I would just change your alternator and fugettaboutit, your problems will go away.


You can just leave things be for now (I wouldn't myself if you can afford to replace it), but I would definitely have a backup plan if you plan to take the car on a long trip somewhere. It may work another year, or a month, it's anybody's guess.
dynobrat is offline  
post #8 of 11 (permalink) Old 04-12-2012
Site Sponsor
 
Brenspeed's Avatar
 
Joined: Jul 2005
Location: North Webster
Posts: 1,713
 
Quote:
Originally Posted by GTDanny View Post
So does anyone know what the alternator is doing or what is causing the surge??? Voltage? Amperage?....... I thought i saw somewhere it could have happend when the battery was changed... I have changed the battery a few months ago....

i have a 87/89 tune that seems to NOT "DO IT" as bad... It's worse with the more aggressive Brenspeed 93 tune.... Why so????

Thanks, Danny

The throttle response is probably more aggressive on the 93 tune causing the surging to be more noticable.

Brenspeed Staff
Brenspeed Mustang Performance
Located in Indiana & Texas
Installation Facility - Mail Order
Phone: 574.594.9559
Roush Top 10 Dealer and Authorized Installer
FRPP/Paxton/Vortech/E-Force
3V & 5.0L Turn Key Supercharger Packages!
Brenspeed is offline  
post #9 of 11 (permalink) Old 04-12-2012 Thread Starter
PONY Member
 
GTDanny's Avatar
 
Joined: Dec 2009
Location: Blythewood
Posts: 309
 
Thanks for asll the input!!!! Should i get a new alternator or will a reman work just as well?????

thanks again, Danny

2007 GT
GTDanny is offline  
Site Sponsor
 
Brenspeed's Avatar
 
Joined: Jul 2005
Location: North Webster
Posts: 1,713
 
Either should work just fine. Compare prices and go with what is in your budget. If the new alternator isnt that much more, then I would recommend going with that.

Brenspeed Staff
Brenspeed Mustang Performance
Located in Indiana & Texas
Installation Facility - Mail Order
Phone: 574.594.9559
Roush Top 10 Dealer and Authorized Installer
FRPP/Paxton/Vortech/E-Force
3V & 5.0L Turn Key Supercharger Packages!
Brenspeed is offline  
post #11 of 11 (permalink) Old 04-16-2012 Thread Starter
PONY Member
 
GTDanny's Avatar
 
Joined: Dec 2009
Location: Blythewood
Posts: 309
 
Quote:
Originally Posted by GTDanny View Post
Thanks for asll the input!!!! Should i get a new alternator or will a reman work just as well?????

thanks again, Danny
I just bought a new PA Performance alternator from AM... Let's hope this does the trick...

Danny

2007 GT
GTDanny is offline  
Sponsored Links
Advertisement
 
Reply

Tags
brenspeed tune , coils , plugs , spark , surges

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182