Need help with idle issues
#1
Evolved Member
Thread Starter
Need help with idle issues
When braking & coming to almost a complete stop after a high rpm/load run, rpm would drop too low to around 500rpm causing the car to hesitate or even stall! Although, the stock 'desired idle RPM-Drive' is 703rpm. I tried increasing desired idle to 1000rpm to no avail, rpm still dropped to 500 after wots, stalling the car.
I realize that it could be either an electrical or a mechanical issue, but I'm not sure what it is! Is there a way to remedy it through the idle/ISCV tables?
Another issue I'm facing is cold starts, when cold, idle starts too high at around 2000rpm, although desired cold idle is 1400-1200rpm! I decreased desired idle in the table to 800 & it helped a bit, cold idle dropped below 2000, but still, it's never consistent.
The car is a JDM E8, 2.3L & BC 272 camshafts. The car has 1000cc denso injectors, but I had the same issues when stock injectors were on.
I'd really appreciate any tips, suggestions
I realize that it could be either an electrical or a mechanical issue, but I'm not sure what it is! Is there a way to remedy it through the idle/ISCV tables?
Another issue I'm facing is cold starts, when cold, idle starts too high at around 2000rpm, although desired cold idle is 1400-1200rpm! I decreased desired idle in the table to 800 & it helped a bit, cold idle dropped below 2000, but still, it's never consistent.
The car is a JDM E8, 2.3L & BC 272 camshafts. The car has 1000cc denso injectors, but I had the same issues when stock injectors were on.
I'd really appreciate any tips, suggestions
#2
Evolved Member
iTrader: (10)
The desired idle speed table won't really help with the 2 issues you're having. The ISCV tables are what you're looking for.
The thread below should help. You'll need to check if these tables have been found for your rom id
https://www.evolutionm.net/forums/ec...sassembly.html
The thread below should help. You'll need to check if these tables have been found for your rom id
https://www.evolutionm.net/forums/ec...sassembly.html
#3
Evolved Member
iTrader: (35)
This is the same problem I have. If I drive normal and Im coasting and push the clutch in and let the idle drop its fine. If I put any kind of load on the motor and push the clutch in the idle drops and engine stalls. This is only in closed loop operation. When the car is warming up the car never stalls or even attempts to stall in this situation. Ill take at look at that link though Raptord.
#4
Evolved Member
Thread Starter
This is the same problem I have. If I drive normal and Im coasting and push the clutch in and let the idle drop its fine. If I put any kind of load on the motor and push the clutch in the idle drops and engine stalls. This is only in closed loop operation. When the car is warming up the car never stalls or even attempts to stall in this situation. Ill take at look at that link though Raptord.
Last edited by foxbat; Mar 17, 2012 at 06:37 AM.
#7
Evolved Member
iTrader: (35)
My low trim is at +6 and my mid is at -2. So not perfect. This is definitely from the cams. All my stalling issues started with my HKS 272 cams. I was able to fix it by bumping up the idle stepper tables but now I have GSC S2 cams and no this problem is back again. Bumping up my idle stepper table helped but only so much.
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#8
Evolved Member
I know a few guys that have this issue with stock cams, stock engine. Problem seems to stem from hard intake pipe from MAF to turbo and/or pod filter install. Fuel trims fine in all cases.
Interested to know exactly what ISCV tables to look for and how to modify them to solve it.
This is the perfect description of the problem:
Interested to know exactly what ISCV tables to look for and how to modify them to solve it.
This is the perfect description of the problem:
If I drive normal and Im coasting and push the clutch in and let the idle drop its fine. If I put any kind of load on the motor and push the clutch in the idle drops and engine stalls. This is only in closed loop operation. When the car is warming up the car never stalls or even attempts to stall in this situation.
#9
Evolved Member
iTrader: (10)
My low trim is at +6 and my mid is at -2. So not perfect. This is definitely from the cams. All my stalling issues started with my HKS 272 cams. I was able to fix it by bumping up the idle stepper tables but now I have GSC S2 cams and no this problem is back again. Bumping up my idle stepper table helped but only so much.
#13
Evolved Member
Thread Starter
My low trim is at +6 and my mid is at -2. So not perfect. This is definitely from the cams. All my stalling issues started with my HKS 272 cams. I was able to fix it by bumping up the idle stepper tables but now I have GSC S2 cams and no this problem is back again. Bumping up my idle stepper table helped but only so much.