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03-30-02, 11:53 PM
#4
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Holds the engine at about 3000 rpm for a short time (17 seconds @70 degrees F) when you first start it up. This helps warm up the cats, if you got 'em.
Irv, Keith's dad
Irv, Keith's dad
03-31-02, 12:19 AM
#5
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that's the AWS = accellerated warmup system as Ivr said.
if I cap it off at the mainifold and IC will it do any harm? it just won't do the start up right? if I remove it and unplug it will it give me the engine light? I want to get rid of the start up. right now I just start it in gear.
if I cap it off at the mainifold and IC will it do any harm? it just won't do the start up right? if I remove it and unplug it will it give me the engine light? I want to get rid of the start up. right now I just start it in gear.
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03-31-02, 12:56 AM
#8
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the plug is what tells the ecu to open or close the AWS... but the 89-91's don't have the plug at the bottom of the rad. it's in behind the water pump... unpluging the AWS would be easy if that works.
03-31-02, 04:09 AM
#10
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On a 86-88 if you pull the plug on the water themp switch on the bottom of the radiator, youi not only disable the 17 second start up cycle, your also disabling the Relief Solenoid and therefore disabling the funciton of the ACV. Come to think of it, the Swithcing Solenoid might as well be considered non-functional also since all the air pump air is being dumped into the silencer instead of being ported to where it should go.
03-31-02, 01:53 PM
#12
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I have not doubt lots of people do it. I did it for awhile on a jury rig for the aux actuators/airpump, but by chance figured out what else it was doing. Its the kind of thing that you can correct in a heartbeat though by reconnecting it. That was just a word of caution for those that have to pass emissions. To check out the validity of the statement, just pull the exaust hose of the acv off and feel the airflow before and after disconnecting the switch at the bottom of the radiator. No to little flow with it connected, large flow with the sw disconnected. Not a big deal in the scheme of things.
03-31-02, 02:08 PM
#13
HAILERS
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And now for emissions trivia. If the AIRBYPASS SOLENOID (called another name on later than 88 cars) has its plug disconnected, the car will still have a high rpm idle for 17 seconds. Will do that on turbos and na's. I learned that when I thought I was using my noodle and thought all I had to do to disable the 3000rpm startup, was to disconnect the electrical plug to the airbypass solenoid. Much to my surprise, the darn car still rev'd for 17seconds during a cold start. I found that the bac is also active for 17seconds, and the rpm is not quite as great. Its about 2600rpm with the airbypass solenoid disabled. So, there, trivia for the day. Now who knows why a turbo car does not have a delay valve to interact with the double throttle diaphram and the n/a does. The turbo car has a checkvalve instead, according to the manual.
01-12-04, 05:45 PM
#14
Nothing to see here.
Originally posted by HAILERS
And now for emissions trivia. If the AIRBYPASS SOLENOID (called another name on later than 88 cars) has its plug disconnected, the car will still have a high rpm idle for 17 seconds. Will do that on turbos and na's. I learned that when I thought I was using my noodle and thought all I had to do to disable the 3000rpm startup, was to disconnect the electrical plug to the airbypass solenoid. Much to my surprise, the darn car still rev'd for 17seconds during a cold start. I found that the bac is also active for 17seconds, and the rpm is not quite as great. Its about 2600rpm with the airbypass solenoid disabled. So, there, trivia for the day. Now who knows why a turbo car does not have a delay valve to interact with the double throttle diaphram and the n/a does. The turbo car has a checkvalve instead, according to the manual.
And now for emissions trivia. If the AIRBYPASS SOLENOID (called another name on later than 88 cars) has its plug disconnected, the car will still have a high rpm idle for 17 seconds. Will do that on turbos and na's. I learned that when I thought I was using my noodle and thought all I had to do to disable the 3000rpm startup, was to disconnect the electrical plug to the airbypass solenoid. Much to my surprise, the darn car still rev'd for 17seconds during a cold start. I found that the bac is also active for 17seconds, and the rpm is not quite as great. Its about 2600rpm with the airbypass solenoid disabled. So, there, trivia for the day. Now who knows why a turbo car does not have a delay valve to interact with the double throttle diaphram and the n/a does. The turbo car has a checkvalve instead, according to the manual.
I just removed the AWS on my S5 and noticed that it still continues the 17sec, 3000rpm startup! Weirdness abounds. I believe(!) since my BAC still is connected along with the other solenoid on the firewall side of the engine that they may be the culprits? Three solenoids that all do the same thing?
Wonder what happened to the gentleman that was going to mod the ECU to function with ONLY the BAC?
PS. Hailers--still owe you a steak!
B