2.3 turbo Problems - Forums at Modded Mustangs
Reply
 
LinkBack Thread Tools
post #1 of 24 Old September 8th, 2008, 09:08 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
2.3 turbo Problems

Okay I have been reading this forum and a few other trying to figure out some answers to my problems. So here's the story, I have a 1986 SVO motor i put into my sand rail, I had MSII installed and tuned by a local shop, Everything was running fine for a week or so, but then it started running rough. I started with plugs and wires, no change. Moved on to the cap and router, still no change. I drained the fuel changed the pump to a new 225gph inline pump, fuel pressure is 40psi at idle. Also I checked the timing and set it at 10#, the MSII says 18# advanced timing? im not familiar with MS. I changed the manifold gasket and turbo gasket. well now it idles smooth well atleast better than it was but it wont rev past 3800-4000 rpm. So i thought that it might have been the ignition module, changed that no change. So after all this changing and swapping of parts it still doesnt run right. It will build 10psi of boost(supposed to be 20psi) and then cuts out and backfires and shudders at 3800 rpm, where should i look next?
Smoked is offline  
Sponsored Links
Advertisement
 
post #2 of 24 Old September 8th, 2008, 11:13 PM
Regular
 
Join Date: Jun 2007
Location: Brandon, FL
Posts: 368
 
iTrader: 0 reviews
I'd say incorrectly gapped plugs, possibly incorrect temp plugs, or possibly just to much gas. What kinda plugs are you running? I'll check my base fuel pressure tomorrow after work and let you know what mine is with the vacuum line unplugged and plugged. It might also not be enough timing. With mine set at a base of 10 with the spout out, when I plug it in I believe it goes from 20 and up pending on the rpm range. Wait for TurboLX to post though, he knows more about these things than I do.

Quote:
Originally Posted by Hourofpain
If i put flowmasters on my lawn mower will it sould like a gt?
akatagyourit is offline  
post #3 of 24 Old September 8th, 2008, 11:59 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
I just checked cam timing and it looks to be good. I have been looking around on the harness and it looks like the shop that wired the MSII up didnt leave this "spout" wire there, If someone could tell me where it leads to i can try to track it down. also im running NGK TR5's gapped at .32, im gonna try dropping them to .28 to see if that makes any difference. Also keep in mind the tune was good and it ran awsome untill what i thought fould a plug. Im about to pull my hair out. And also there is no knock sensor as i have a custom upper and its been removed,
Smoked is offline  
post #4 of 24 Old September 9th, 2008, 12:14 AM
Regular
 
Join Date: Aug 2008
Location: Denton Tx
Posts: 147
 
iTrader: 0 reviews
Send a message via AIM to thatdavidkid Send a message via Yahoo to thatdavidkid
silly question but are you running cats of some type? 'cause that's what it sounds like... clogged cat... or something of that nature... also, check your vain air meter... make sure it's putting out good signals.
thatdavidkid is offline  
post #5 of 24 Old September 9th, 2008, 12:42 AM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
no cats. And No VAM. It does use a map sensor in the ms
Smoked is offline  
post #6 of 24 Old September 9th, 2008, 03:03 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
idk why you had a MSII installed first off, unless your pushing over 500hp in the 2.3 then theres no need for it, the LA3 flashed can do you good to 400-450hp.

MegaSquirt - Electronic Fuel Injection Computer by Bowling & Grippo * * ©2005

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
post #7 of 24 Old September 9th, 2008, 03:06 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
whats your reading at the vRef?

an are you using the crank trigger with TFI setup?

whats your general settigs at now? did you change them?

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
post #8 of 24 Old September 9th, 2008, 04:26 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
well the local shop said that this was the best thing to do, and I am new to efi stuff so I listened to there advice. Also I'm not sure what the settings are I will take a look tonight. I'm not yet familiar with ms so some explaination may be needed
Smoked is offline  
post #9 of 24 Old September 9th, 2008, 04:47 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
download there PDF manual.

there talked you into something you dont even need

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
post #10 of 24 Old September 9th, 2008, 06:33 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
Well here's a thought, why would the tune be off when it was not ever changed? And it ran great before
Smoked is offline  
post #11 of 24 Old September 9th, 2008, 10:33 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
it happens, if you have a manual boost controller then it problably adjusted itself an turned the boost up or down.

take it back to the guys who installed it an talk to them

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
post #12 of 24 Old September 9th, 2008, 11:12 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
it doesn't have a boost controller. I will see if I can find somone else local to take a look at it, I didn't have a pleasant expirience with the shop that installed the ms.
Smoked is offline  
post #13 of 24 Old September 9th, 2008, 11:19 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
Also I pulled the new plugs to see what they look like, cyl 1 and 2 are a orange/tan color and 3 was still clean with a little black,4 looked clean and new, and yes they are all firing at idle and up to 4k rpm, also changed gap to .28 with no change
Smoked is offline  
post #14 of 24 Old September 10th, 2008, 09:18 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
ok well i finally tracked the problem down, cyl 3 and 4 are wired to injector driver 2 in MS, Apparently i have a bad driver because its not pulsing, both sides are powered on the injector and stay that way, Anyone know how to fix this?
Smoked is offline  
post #15 of 24 Old September 10th, 2008, 11:10 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
how do you have the injectors setup on the settings?

do you have in sequential or non sequential?

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
post #16 of 24 Old September 11th, 2008, 12:00 AM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
sequential I believe but I will have to check tomorrow. I just wired all of them to inj1 and it runs great again but I still want to fix it correctly
Smoked is offline  
post #17 of 24 Old September 11th, 2008, 08:59 PM Thread Starter
Newbie
 
Join Date: Sep 2008
Posts: 18
 
iTrader: 0 reviews
well it quit working again, i think it burned the injector drivers up,
what are th impedance of stock SVO injectors?
Smoked is offline  
post #18 of 24 Old September 11th, 2008, 10:47 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
hmm not to sure, there low impendance thats for sure, ill have to check what they are

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
post #19 of 24 Old September 16th, 2008, 12:38 PM
Authorized Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2008
Location: Covington, GA
Posts: 438
 
iTrader: 0 reviews
For those following along, we've been in contact on other forums and this one turned out to be physical damaged to the injector drivers.
Matt Cramer is offline  
post #20 of 24 Old September 16th, 2008, 02:26 PM
I Post Entirely Way Too Much
 
TurboLX's Avatar
 
Join Date: Oct 2006
Location: NY
Posts: 8,781
Blog Entries: 1
   
iTrader: 0 reviews
Send a message via AIM to TurboLX
ahh that explains it, this one had me stumped

1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.
TurboLX is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Forums at Modded Mustangs 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.

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 On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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