Sorry. Idles fine when cold, almost dies when warm.
#1
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Sorry. Idles fine when cold, almost dies when warm.
Hello, I have an 1987 s4 Tii.
I just had a fresh rebuild on the car, it drives great, and runs really nice on startup. It will idles at 750-1100 (Cant remember right now) on start up, but once it is fully warm, it drops to around 500 and sounds like it is running on one rotor. Where should I start first. Fairly certain I am good on vacuum, as I capped what is necessary with silicon caps, and replaced the old vacuum lines, one at a time. I never adjusted the idle after rebuild, just timing.
What should I start by checking? Idle, Plugs, Thermowax system on throttle body??????
Mods are
Rtek 1.7
Racing beat rev TII exhaust
720 cc secondary injectors - New
550 cc primary injectors - New
- Also put in new fuel filter, pump, sock, and lines. Parallel fuel system with Aeromotive FPR at 40 psi
Stock airbox
any help is appreciated, I think I will check the TPS tomorrow.
I just had a fresh rebuild on the car, it drives great, and runs really nice on startup. It will idles at 750-1100 (Cant remember right now) on start up, but once it is fully warm, it drops to around 500 and sounds like it is running on one rotor. Where should I start first. Fairly certain I am good on vacuum, as I capped what is necessary with silicon caps, and replaced the old vacuum lines, one at a time. I never adjusted the idle after rebuild, just timing.
What should I start by checking? Idle, Plugs, Thermowax system on throttle body??????
Mods are
Rtek 1.7
Racing beat rev TII exhaust
720 cc secondary injectors - New
550 cc primary injectors - New
- Also put in new fuel filter, pump, sock, and lines. Parallel fuel system with Aeromotive FPR at 40 psi
Stock airbox
any help is appreciated, I think I will check the TPS tomorrow.
#2
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always a good start, basics first and then go from there.
i'd check the timing, and then make sure the trailings are firing too.
then you can set the idle mixture and some BAC valves are adjustable and you can try that.
after that you're looking for vacuum leaks
i'd check the timing, and then make sure the trailings are firing too.
then you can set the idle mixture and some BAC valves are adjustable and you can try that.
after that you're looking for vacuum leaks
#4
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The following users liked this post:
gatesrex91 (12-31-21)
#6
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Yea! So I decided to check my spark plugs. It is about 60 miles after the rebuild and very light cruising. The spark plugs were black, and had assembly grease on them. Cleaned them off, and it worked like a charm
The following 2 users liked this post by Stussy:
gatesrex91 (02-04-22),
j9fd3s (02-04-22)
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