MTI 427 startup problems
Guest
Posts: n/a
MTI 427 startup problems
Hi everyone, we have a funny problem with my friends new MTI 427
C5R engine.
It starts ok, idles kind of rough, have not done idle relearn procedyre yet.
After a while, my friend went trough different gears (idle standing still) and we shut her down.
Then we cant get her to start up again ???
It tries to start, but shuts down again.
With Ease scanner i looked at all DTC and cleared them, there was two B errors, cant remember #, but it was regarding battery.
a few U errors, and one Pxxxx regarding TCM something.
Not anything that should indicate engine failure......
After a little cool down period, engine started up nice again ? wtf.....
Same thing happen over again, go trough gears, shut down and would not start again.
pleeese help out if anyone know where to start..
C5R engine.
It starts ok, idles kind of rough, have not done idle relearn procedyre yet.
After a while, my friend went trough different gears (idle standing still) and we shut her down.
Then we cant get her to start up again ???
It tries to start, but shuts down again.
With Ease scanner i looked at all DTC and cleared them, there was two B errors, cant remember #, but it was regarding battery.
a few U errors, and one Pxxxx regarding TCM something.
Not anything that should indicate engine failure......
After a little cool down period, engine started up nice again ? wtf.....
Same thing happen over again, go trough gears, shut down and would not start again.
pleeese help out if anyone know where to start..
Safety Car
Joined: Oct 2001
Posts: 3,504
Likes: 25
From: Insert Wittty Comment here
Re: MTI 427 startup problems (c5norway)
My buddy has a similar issue. His car starts fine, if you shut it down and try to do a warm restart the car dies unless you feed it throttle. I think he need a bit more tuning. But I will ask around a bit more...
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: MTI 427 startup problems (c5norway)
I don't know if LSI edit and the PCM in a 98' has the iac park and running airflow tables in the idle and limiters tab. If it does, raise the values in iac park by .05 at a time, at temps 80c and up. If you don't have the tables try multiplying the Main VE tables by 60% in 400 to 1200 columns.
Drifting
Joined: Nov 2001
Posts: 1,448
Likes: 16
From: Humble tx
Re: MTI 427 startup problems (c5norway)
Hi everyone, we have a funny problem with my friends new MTI 427
C5R engine.
It starts ok, idles kind of rough, have not done idle relearn procedyre yet.
After a while, my friend went trough different gears (idle standing still) and we shut her down.
Then we cant get her to start up again ???
It tries to start, but shuts down again.
With Ease scanner i looked at all DTC and cleared them, there was two B errors, cant remember #, but it was regarding battery.
a few U errors, and one Pxxxx regarding TCM something.
Not anything that should indicate engine failure......
After a little cool down period, engine started up nice again ? wtf.....
Same thing happen over again, go trough gears, shut down and would not start again.
pleeese help out if anyone know where to start..
C5R engine.
It starts ok, idles kind of rough, have not done idle relearn procedyre yet.
After a while, my friend went trough different gears (idle standing still) and we shut her down.
Then we cant get her to start up again ???
It tries to start, but shuts down again.
With Ease scanner i looked at all DTC and cleared them, there was two B errors, cant remember #, but it was regarding battery.
a few U errors, and one Pxxxx regarding TCM something.
Not anything that should indicate engine failure......
After a little cool down period, engine started up nice again ? wtf.....
Same thing happen over again, go trough gears, shut down and would not start again.
pleeese help out if anyone know where to start..
Just wondering what MTI had to say? I assume that you have called them. They will be the best source for a solution on their engine. Just a thought. I know that when I have a problem, Lou is the guy I call and he would get pissed if I called someone else on his engine.
Best of luck
Randy Goss
Drifting
Joined: Nov 2001
Posts: 1,448
Likes: 16
From: Humble tx
Re: MTI 427 startup problems (c5norway)
Hi everyone, we have a funny problem with my friends new MTI 427
C5R engine.
It starts ok, idles kind of rough, have not done idle relearn procedyre yet.
After a while, my friend went trough different gears (idle standing still) and we shut her down.
Then we cant get her to start up again ???
It tries to start, but shuts down again.
With Ease scanner i looked at all DTC and cleared them, there was two B errors, cant remember #, but it was regarding battery.
a few U errors, and one Pxxxx regarding TCM something.
Not anything that should indicate engine failure......
After a little cool down period, engine started up nice again ? wtf.....
Same thing happen over again, go trough gears, shut down and would not start again.
pleeese help out if anyone know where to start..
C5R engine.
It starts ok, idles kind of rough, have not done idle relearn procedyre yet.
After a while, my friend went trough different gears (idle standing still) and we shut her down.
Then we cant get her to start up again ???
It tries to start, but shuts down again.
With Ease scanner i looked at all DTC and cleared them, there was two B errors, cant remember #, but it was regarding battery.
a few U errors, and one Pxxxx regarding TCM something.
Not anything that should indicate engine failure......
After a little cool down period, engine started up nice again ? wtf.....
Same thing happen over again, go trough gears, shut down and would not start again.
pleeese help out if anyone know where to start..
did you put a new computer or a new program in the computer? It sounds like the security defeat is kicking in. If you haven't tried it yet, do a full relearn first.
Just wondering what MTI had to say? I assume that you have called them. They will be the best source for a solution on their engine. Just a thought. I know that when I have a problem, Lou is the guy I call and he would get pissed if I called someone else on his engine.
Best of luck
Randy Goss
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Racer
Joined: Sep 2002
Posts: 460
Likes: 1
From: Daytona Beach FL
Re: MTI 427 startup problems (99 WS-7)
We have been tuning for that specific problem for the last few days on my MTI X1 cam car. It is worst when the AC is on when starting it hot. Basically, Jim has been increasing the initial air flow for additional revolutions of the cam and it is working it out. We almost have it.
Melting Slicks
Joined: Feb 2001
Posts: 3,360
Likes: 1
From: DFW TX
Senior Member
Cruise-In III Veteran
Cruise-In IV Veteran
Re: MTI 427 startup problems (Waterfreak)
Do the security relearn procedure and then do the crank position sensor relearn procedure.
Good luck. :cheers:
Good luck. :cheers:
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: MTI 427 startup problems (c5norway)
Rune, what year PCM does he have??
If it is 99 or 2000 you can try my idle runing.
It worked perfect for me.
My engine didn´t start without it.
I would share the with you.
Robert (RWJ383) who did my idle tune got it near 100% right on the first try!!!
Michael
If it is 99 or 2000 you can try my idle runing.
It worked perfect for me.
My engine didn´t start without it.
I would share the with you.
Robert (RWJ383) who did my idle tune got it near 100% right on the first try!!!
Michael
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: MTI 427 startup problems (Austrian Vette)
:iagree:
This is the easiest, cheapest and very safe place to start. As long as you have a copy of your MTI PCM file you can always restore it. More and more people are finding out about using the idle and limiters section to correct startup, idle, surging, hunting racing etc. This tuning will not effect the WOT performance of your car.
This is the easiest, cheapest and very safe place to start. As long as you have a copy of your MTI PCM file you can always restore it. More and more people are finding out about using the idle and limiters section to correct startup, idle, surging, hunting racing etc. This tuning will not effect the WOT performance of your car.
Melting Slicks
Joined: Jan 2001
Posts: 2,635
Likes: 2
From: Aloha, Oregon
Re: MTI 427 startup problems (Austrian Vette)
Rune, what year PCM does he have??
If it is 99 or 2000 you can try my idle runing.
It worked perfect for me.
My engine didn´t start without it.
I would share the with you.
Robert (RWJ383) who did my idle tune got it near 100% right on the first try!!!
Michael
If it is 99 or 2000 you can try my idle runing.
It worked perfect for me.
My engine didn´t start without it.
I would share the with you.
Robert (RWJ383) who did my idle tune got it near 100% right on the first try!!!
Michael
1. engine specs
2. trans type + stall converter size
3. Fuel octane used daily
4. Naked pictures of women from your country (ok, not a requirement, but, it will help!!!:o)
5. any scan you can provide in .txt format.
I will do the rest.
We'll fix you up right nice!! If you have an A4 trans, Michael Drs can share his tune with you. Caveat- top secret stuff in it!! ok, maybe not...:o)
All joking aside...i can help you if you send me the above info (naked pics are definitely bonus points!!)
Robert Judd
NiTech Motorsports
[Modified by rwj383, 11:45 AM 5/7/2003]
Melting Slicks
Joined: Aug 1999
Posts: 2,540
Likes: 2
From: Milwaukee WI
LS1Edit Guru
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Re: MTI 427 startup problems
The problem is IAC park and idle airflow.. common issues with larger cams in these strokers.. 10 minutes with LS1Edit and you're all fixed...
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: MTI 427 startup problems (rwj383)
I've mailed my file to you. Add it to your experience. My mods are listed. jfpilla :thumbs:
Copy me on the photos. :lol:
[Modified by jfpilla, 3:21 PM 5/7/2003]
Copy me on the photos. :lol:
[Modified by jfpilla, 3:21 PM 5/7/2003]
Guest
Posts: n/a
Re: MTI 427 startup problems (Austrian Vette)
Hi Michael, PCM is 1997, and tonight i think we solved it.
First we drilled a small hole in trottle blade, next we found a little vacuum leak, actually the Vacuum to Level IV trans was disconnected back at the trans :-o
Did the security learn procedyre, idle learn and now it seems ok.
Thanks everyone for input and assistanse.
First we drilled a small hole in trottle blade, next we found a little vacuum leak, actually the Vacuum to Level IV trans was disconnected back at the trans :-o
Did the security learn procedyre, idle learn and now it seems ok.
Thanks everyone for input and assistanse.
