Need help!! Twin turbo silverado
02-20-2018, 03:42 PM
#1
Teching In
Thread Starter
Join Date: May 2017
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
Need help!! Twin turbo silverado
I知 getting a bad bucking/falls on its face just after 3k-3500 rpm, Hook my scanner to it and everything looks to be working. And it throws a p0121( TP position) code every time I can get it to fail, driving regular you would never tell anything is wrong with it until you get on it(maybe a slight surge at part throttle at times)
Mods: twin 60mm eBay turbo @8psi
60lb injectors
206/212 112lsa cam
walbro 450
duel flowmaster40s (if that matters)
2bar map
things ive tried to fix it
new maf
map
throttle body
throttle pedal
intake gasket
new tr6 plugs @.30
checked continuity &power between the pcm and the first 4 things I listed.
Obviously been to the tuners (2) and they can稚 fix it
smoke tested
and I知 pulling the valve covers off now to check the springs.
Is is there anything I知 missing ? Any help would be much apreciated. I値l send you an 18pk if you lead to the fix lol
and it痴 holding 8 psi through the run
Thanks!
Mods: twin 60mm eBay turbo @8psi
60lb injectors
206/212 112lsa cam
walbro 450
duel flowmaster40s (if that matters)
2bar map
things ive tried to fix it
new maf
map
throttle body
throttle pedal
intake gasket
new tr6 plugs @.30
checked continuity &power between the pcm and the first 4 things I listed.
Obviously been to the tuners (2) and they can稚 fix it
smoke tested
and I知 pulling the valve covers off now to check the springs.
Is is there anything I知 missing ? Any help would be much apreciated. I値l send you an 18pk if you lead to the fix lol
and it痴 holding 8 psi through the run
Thanks!
02-20-2018, 03:45 PM
#2
Teching In
Thread Starter
Join Date: May 2017
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
[QUOTE=Sage G;5432033]
I知 getting a bad bucking/falls on its face just after 3k-3500 rpm, Hook my scanner to it and everything looks to be working. And it throws a p0121( TP position) code every time I can get it to fail, driving regular you would never tell anything is wrong with it until you get on it(maybe a slight surge at part throttle at times)
Mods: twin 60mm eBay turbo @8psi
60lb injectors
206/212 112lsa cam
walbro 450
duel flowmaster40s (if that matters)
2bar map
things ive tried to fix it
new maf
map
throttle body
throttle pedal
intake gasket
new tr6 plugs @.30
checked continuity &power between the pcm and the first 4 things I listed.
Obviously been to the tuners (2) and they can稚 fix it
smoke tested
and I知 pulling the valve covers off now to check the springs.
Is is there anything I知 missing ? Any help would be much apreciated. I値l send you an 18pk if you lead to the fix lol
and it痴 holding 8 psi through the run
Thanks!
Forgot to say it痴 a 08 silverado 1500 5.3 ly5 engineMods: twin 60mm eBay turbo @8psi
60lb injectors
206/212 112lsa cam
walbro 450
duel flowmaster40s (if that matters)
2bar map
things ive tried to fix it
new maf
map
throttle body
throttle pedal
intake gasket
new tr6 plugs @.30
checked continuity &power between the pcm and the first 4 things I listed.
Obviously been to the tuners (2) and they can稚 fix it
smoke tested
and I知 pulling the valve covers off now to check the springs.
Is is there anything I知 missing ? Any help would be much apreciated. I値l send you an 18pk if you lead to the fix lol
and it痴 holding 8 psi through the run
Thanks!
02-21-2018, 12:19 PM
#4
TECH Regular
I would start with tightening up your gap. That is an easy check. Try bringing your gap down to .025. If that doesn't change it you can open the gap back up.
I always shoot for the most gap you can get. I start tight and make sure it runs good. Then start opening it up until you get blowout, then go just a little tighter.
I always shoot for the most gap you can get. I start tight and make sure it runs good. Then start opening it up until you get blowout, then go just a little tighter.
02-22-2018, 07:25 AM
#9
Teching In
Thread Starter
Join Date: May 2017
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
02-22-2018, 07:28 AM
#10
Teching In
Thread Starter
Join Date: May 2017
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts