07-11-2006, 04:09 AM
|
#1 |
|
Stock
Join Date: Apr 2006
Location: Indianapolis
Posts: 6
 |
'92 7MGTE- high and unstable idle
GreetingS to all!
Need help pls with HIGH and UNSTABLE idle. Idling RPM fluctuates up and down between 1400 to 1800. I sprayed the vacuum hoses connections with carb cleaner, and don't appear to have any vacuum leaks. Timing set at 12 deg BTDC. I did notice a crack (which I temporarily tape wrapped) near the hose clamp on the big hose/tube connecting the turbo to the air cleaner . Could this be causing the erratic idle? If not, pls advise whatelse could be causing it. THANKS MUCH IN ADVANCE FOR YOUR HELP! |
|
|
|
01-29-2007, 11:28 PM
|
#2 | |
|
3" Exhaust
Join Date: Aug 2006
Location: Rhode Island
Posts: 63
|
Quote:
any cracked hose is bad news. replace it regardless
__________________
Its broke, it could be anything, and cost of repairs will greatly exceed the value of the car |
|
|
|
|
|
01-31-2007, 05:07 AM
|
#3 |
|
1000whp postwhore
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
|
Cleaning and testing tip
Don't use carb cleaner to check for leaks. It is too strong a chemical, and can cause problems with rubber hoses, electrical connections, and more, etc.
Use WD40, or the prefered,....brake cleaner spray.
__________________
Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. |
|
|
|
|
01-31-2007, 02:17 PM
|
#4 |
|
Intake
Join Date: Nov 2006
Location: Phoenix, Az.
Posts: 48
|
I had the same issue as you described. Turns out, the accordian hose to the turbo was split open. Very brittle. PO tried to silicone it, but no go. Only found out after removing it that it was split at the bottom. Couldn't see it otherwise. New hose at the dealer for $47, and she runs like a champ, and idle is great.
|
|
|
|
|
01-31-2007, 04:14 PM
|
#5 |
|
3" Exhaust
Join Date: Aug 2006
Location: Rhode Island
Posts: 63
|
Any air coming in past that MAF sensor. The box right behind your air cleaner which has a black connector coming out of it is going to make your car idle funny. I have the same problem and i can't find it.
Propane is the best leak detector because it will make your car stop idling funny instantly. But its expensive and dangerous to use. its best to brake cleaner or something else
__________________
Its broke, it could be anything, and cost of repairs will greatly exceed the value of the car |
|
|
|
|
01-31-2007, 11:56 PM
|
#6 |
|
Lexus & 550's
Join Date: Apr 2005
Location: Bossier City LA
Posts: 556
|
Propane is Pro Way
Why would something that is expensive and dangerous be the best at detecting anything?!?!?!?! Like saying a stick of dynamite is the best way to put out a campfire, oh, it will do it, but what a mess.
Russ Last edited by mrnickleye; 02-01-2007 at 06:03 AM. |
|
|
|
|
02-01-2007, 06:03 AM
|
#7 | |
|
1000whp postwhore
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
|
Pros Use Propane
Quote:
A leak will show up quickly. I don't recommend this for home use or beginners.
__________________
Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. |
|
|
|
|
|
02-04-2007, 03:18 AM
|
#8 |
|
3" Exhaust
Join Date: Aug 2006
Location: Rhode Island
Posts: 63
|
yeha i mean that propane tanks can explode if your not careful about it. we use it in the shop to detect the leaks. its usually really good.
__________________
Its broke, it could be anything, and cost of repairs will greatly exceed the value of the car |
|
|
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| hesitation, high cold idle and poor gas mileage | sd88supra | MKIII Supra | 14 | 02-06-2007 04:17 AM |
Linear Mode
