weird idle (searched)
#1
Still learning
Thread Starter
Join Date: Dec 2003
Location: Elk Grove, CA
Posts: 638
Likes: 0
Received 0 Likes
on
0 Posts
weird idle (searched)
I got an 88 vert and when i turn it on it goes to 2000 to 2500 rpms instead of 3000, and then immediately drops to about 1500 and stays there. When i start driving the rpms will go back up to 2000 and when im idling it'll remain at 2000. After ive been driving for awhile the rpms will go down to about 1100 when idling, and eventually back down to the regular idle. Whats the problem? I searched and found a similar problem and was thinking it was the tps but i dont know. If it is the tps how to i adjust it and what would make the tps change the idle?
#2
I am 2Furious
Join Date: Sep 2004
Location: NJ / Philly
Posts: 846
Likes: 0
Received 0 Likes
on
0 Posts
i think i have the same thing. I've never really seen it as a problem. If AWS likes to set my engine at around 2000 instead of 3000, I could care less. In fact, I'm happier. Don't like my engine running at such a high RPM when cold.
#5
Mountain Rotary Mod
Join Date: Nov 2003
Location: Freaking Poland!!
Posts: 2,411
Likes: 0
Received 0 Likes
on
0 Posts
As for all idle problems you need to start with 2 things.
Look for vacuum leaks and check the TPS.
EDIT: To answer your question specifically. The Throttle Position Sensor (TPS) detects what you have the throttle open to, reports this to the ECU, then the ECU minister fuel accordingly. If the TPS is not adjust correctly it will send an incorrect signal and mess up the idle.
A Vac leak does similarly, unmetered air is either being pulled in or escaping. This will also throw off your idle.
Look for vacuum leaks and check the TPS.
EDIT: To answer your question specifically. The Throttle Position Sensor (TPS) detects what you have the throttle open to, reports this to the ECU, then the ECU minister fuel accordingly. If the TPS is not adjust correctly it will send an incorrect signal and mess up the idle.
A Vac leak does similarly, unmetered air is either being pulled in or escaping. This will also throw off your idle.
Last edited by Parastie; 03-18-05 at 09:51 AM.
#7
Mountain Rotary Mod
Join Date: Nov 2003
Location: Freaking Poland!!
Posts: 2,411
Likes: 0
Received 0 Likes
on
0 Posts
For the vak leaks you're going to have to follow nearly every vacuum line and look for cracked lines. The quick way to determine if you have a vac leek is to buy a can of carb cleaner and spray it around the TB while the engine is running.
The TPS adjustment is outlined in the Factor Service Manual (FSM) and there are links to download it in the FAQ.
The TPS adjustment is outlined in the Factor Service Manual (FSM) and there are links to download it in the FAQ.
Trending Topics
#10
I live in an igloo
Join Date: Jul 2004
Location: calgary alberta
Posts: 2,546
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Parastie
LoL, forgot to mention that part.
The idle will change.
The idle will change.
Spray generously
#11
Mountain Rotary Mod
Join Date: Nov 2003
Location: Freaking Poland!!
Posts: 2,411
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BlaCkPlaGUE
You know, I tried that and it didn't work worth ****...
Spray generously
Spray generously
Maybe WD-40 would work better....
#13
Banned. I got OWNED!!!
Join Date: Nov 2002
Location: San Jose, CA
Posts: 312
Likes: 0
Received 0 Likes
on
0 Posts
i have the same problem.....my TPS is NOT set right........so I have a lot of work this spring break....check for vac lines, install FMIC, and other random **** I have to do.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
ZaqAtaq
New Member RX-7 Technical
2
09-05-15 08:57 PM