Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 09-04-2019, 11:20 AM   #1
Sr20-Vert
Leaky Injector
 
Sr20-Vert's Avatar
 
Join Date: Mar 2011
Location: hollywood
Age: 35
Posts: 136
Trader Rating: (1)
Sr20-Vert is a well-known jackass
Feedback Score: 1 reviews
Sr20det falls on its face after idling 20 sec

Hi I got a Sr20det 850 denso gtx3076 greedy intake manifold R8 coil packs aeromotive fpr set to 45 but tuned at that level running haltech using there on board map car mad just under 500 whp on 93 when it idles for like 15 secs it idles around 12.8 13 afr runs perfect even changed the plugs what happens basically all of a sudden afr goes to 10 and it stalls don’t think it’s boost leak cause car will run with no piping at all because it’s map and not maf can’t figure it out it’s driving me crazy I changed coolant tent sensor also I never really checked if motor was in time with timing gun just set cas right in middle but it was idling fine for a month now it falls on it’s ass after 20 secs or so runs fine while driving makes same boost 21 pounds showing on my blitz edc screen and on boost gauge
Sr20-Vert is offline   Reply With Quote
Sponsored Links
Old 09-05-2019, 02:59 PM   #2
Sr20-Vert
Leaky Injector
 
Sr20-Vert's Avatar
 
Join Date: Mar 2011
Location: hollywood
Age: 35
Posts: 136
Trader Rating: (1)
Sr20-Vert is a well-known jackass
Feedback Score: 1 reviews
Any help greatly I appreciate it
Sr20-Vert is offline   Reply With Quote
Old 09-06-2019, 06:37 AM   #3
jr_ss
Post Whore!
 
Join Date: Dec 2005
Location: Pa
Posts: 6,056
Trader Rating: (34)
jr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nicejr_ss is just really nice
Feedback Score: 34 reviews
Send a message via AIM to jr_ss
So, you’re using the on board Map sensor, which is only good for 15psi, but running at 21?

Have you hooked a laptop up to the car to see what the engine parameters are doing? What does your timing do when it drops to 10afr? There is a plethora of information you can obtain from a laptop and the Haltech. I suggest you datalog when the car is running and contact your tuner with the files. My guess is timing and fuel enrichment maps are off, based on engine temp. This is just a stab though.
__________________
My SR20VET
jr_ss is offline   Reply With Quote
Old 09-06-2019, 01:58 PM   #4
Sr20-Vert
Leaky Injector
 
Sr20-Vert's Avatar
 
Join Date: Mar 2011
Location: hollywood
Age: 35
Posts: 136
Trader Rating: (1)
Sr20-Vert is a well-known jackass
Feedback Score: 1 reviews
I figured out problem was the tube going from intercooler piping to intake manifold idled perfect now rookie mistake on my part
Sr20-Vert is offline   Reply With Quote
Old 09-06-2019, 06:48 PM   #5
Sr20-Vert
Leaky Injector
 
Sr20-Vert's Avatar
 
Join Date: Mar 2011
Location: hollywood
Age: 35
Posts: 136
Trader Rating: (1)
Sr20-Vert is a well-known jackass
Feedback Score: 1 reviews
Quote:
Originally Posted by jr_ss View Post
So, you’re using the on board Map sensor, which is only good for 15psi, but running at 21?

Have you hooked a laptop up to the car to see what the engine parameters are doing? What does your timing do when it drops to 10afr? There is a plethora of information you can obtain from a laptop and the Haltech. I suggest you datalog when the car is running and contact your tuner with the files. My guess is timing and fuel enrichment maps are off, based on engine temp. This is just a stab though.
The haltech onboard map is good to 1.5 bar or 22 psi
Sr20-Vert is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

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

Forum Jump


All times are GMT -6. The time now is 03:18 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™