Idle/throttle bogging questions
Thread Starter
wow, just wow
Joined: Sep 2009
Posts: 11
Likes: 0
From: Mid-Michigan
Idle/throttle bogging questions
Hello, I just put a used s4 na engine in my 87'. I seem to be having 2 problems, 1- when i start it it wants to idle around 1700 rpms. 2- when I open the throttle at any stage it bogs down and wants to stall. Any ideas why it might be doing these thing?
anyways, thanks in advance for your help!
-Ethan
anyways, thanks in advance for your help!-Ethan
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
When you start the car, it should fly to 3000 RPM for 17 seconds, then fall down to around 1500 RPM and slowly drop to 750RPM as the engine warms up.
The 3K startup isn't a big deal if not working. Does the engine speed slowly drop to 750RPM as the engine warms?
As for bogging, check for vacuum leaks, adjust the TPS and check you grounds.
The 3K startup isn't a big deal if not working. Does the engine speed slowly drop to 750RPM as the engine warms?
As for bogging, check for vacuum leaks, adjust the TPS and check you grounds.
Thread Starter
wow, just wow
Joined: Sep 2009
Posts: 11
Likes: 0
From: Mid-Michigan
After the 3k start up it will drop to 1500 rpm, then after it warms up it idles around 16-1700 rpm. I will check the vacuum leaks, check grounds and adjust the TPS later this evening.
revs freely now. As for the idle, it idles steadily at 1500 rpm after the warm up cycle. Any suggestions on that?
Thread
Thread Starter
Forum
Replies
Last Post
Adaptronic S5 Turbo PNP Unit questions
_Tones_
Adaptronic Engine Mgmt - AUS
10
May 25, 2021 05:37 AM
Jeff20B
1st Generation Specific (1979-1985)
73
Sep 16, 2018 07:16 PM
heywier427
Naturally Aspirated Performance Forum
2
Sep 11, 2015 04:49 PM
Nosferatu
2nd Generation Specific (1986-1992)
7
Sep 5, 2015 02:13 PM
