Rebuilt s4 NA block high idle
#1
Rebuilt s4 NA block high idle
I have seemed to eliminate all possible vacuum leaks and replaced every possible gasket on the intake portion of the engine. Replaced tps. Timed it. Calibrated tps. And the lowest idle I can get without it bouncing is 1500rpm... Motor has not seen the road yet. All stock counterparts except for banjo pulsation dampened delete. Any ideas?
#2
Senior Member
How much run time does the motor have?
Mine took a couple weeks of daily running and a few dozen miles until i could get the idle under 1500.
Make sure you're CAS is timed correctly. Mine would bounce bad as the ECU retimed itself.
Mine took a couple weeks of daily running and a few dozen miles until i could get the idle under 1500.
Make sure you're CAS is timed correctly. Mine would bounce bad as the ECU retimed itself.
#4
Rotary Supremacist
iTrader: (1)
Yeah I wouldn't expect a fresh motor to idle right.
The N/A motors have the throttle stop screw don't they? Should be on the opposite side of the throttle body from the TPS. Turn it out to drop the idle, then readjust the TPS from there. If the idle won't drop then your cable could be too tight. The BAC also effects idle, but I wouldn't adjust it until you've eliminated all other possibilities.
The N/A motors have the throttle stop screw don't they? Should be on the opposite side of the throttle body from the TPS. Turn it out to drop the idle, then readjust the TPS from there. If the idle won't drop then your cable could be too tight. The BAC also effects idle, but I wouldn't adjust it until you've eliminated all other possibilities.
#6
S4 block stock port, 460 injectors, nothing crazy. Sounds good, I was begining to think that I was losing it, trying to find a leak that didn't exist! As soon as I got a steady 1500 idle I was able to get the timing done and man was it soo advanced!!!!! The manifold was glowing red when I would just le the motor idle for 20-30 minutes and ran hot. I was thinking that it was normal since I had taken most of the stock shields off the stock exhaust manifold.
Trending Topics
#9
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,826
Received 2,593 Likes
on
1,842 Posts
stuck thermowax?
#13
finally fixed after chasing vacum leaks, timing and adjusting the TPS.....all of which where already fine! this car never came with the PCV solenoid so i had a hose running straight to the intake snorkel..... added the solenoid and now im idling at 700 rpms.....
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM
CaptainKRM
2nd Generation Specific (1986-1992)
14
08-26-15 09:52 PM
ncds_fc
New Member RX-7 Technical
1
08-15-15 10:06 AM