93 Serive Eng, soon light
Thread Starter
Safety Car
Joined: Dec 2009
Posts: 4,363
Likes: 429
From: Birmingham Al
93 Serive Eng, soon light
My 93 ( service Eng. soon ) light comes on as soon as the Motor changes over from ideal to run mode. I have changed the EVAP. solenoid all the trans pressure switches still no change .. Anybody know what happens when it changes over from ideal to run .. Maybe I can narrow it down from there . Thanks ..
Melting Slicks
Joined: Jan 2014
Posts: 2,478
Likes: 254
From: Downers Grove Illinois
My 93 ( service Eng. soon ) light comes on as soon as the Motor changes over from ideal to run mode. I have changed the EVAP. solenoid all the trans pressure switches still no change .. Anybody know what happens when it changes over from ideal to run .. Maybe I can narrow it down from there . Thanks ..
Thread Starter
Safety Car
Joined: Dec 2009
Posts: 4,363
Likes: 429
From: Birmingham Al
Check for codes as shown here.
Melting Slicks
Joined: Jan 2014
Posts: 2,478
Likes: 254
From: Downers Grove Illinois
Thanks but I am past that point and have changed the stuff the codes show that is wrong and still have the codes witch is 26 .. My question is ,OK the light is off till the motor changes over from ideal to run them the light pops on ,what changes when the motor changes over for ideal the run .. I am trying to narrow the problem down .. Thanks ..
Thread Starter
Safety Car
Joined: Dec 2009
Posts: 4,363
Likes: 429
From: Birmingham Al
Yes and the idle valve closes Ok . It may take the system that long to run a check then pop the light comes on . After changing EVAP. solenoid. and a few other things the light stopped coming on as soon as the eng, was turned on now it comes on as soon as the idle valve closes and it goes into the run mode witch is a closed loop deal .. I called the Corvette Doc. shop in Houston said it may be the EVAP. system leek and good luck finding it need a smoke machine and it might even be the gas cap sometimes a new cap will do the job.. I'll just have to keep digging .. thanks ..
Pro
Joined: Aug 2007
Posts: 668
Likes: 38
From: Austin TX
Its easy to make a smoke tool to test for vacuum leaks with a quart can, aquarium pump, tubing and a cigar. Search up on utoob.
https://www.r3vlimited.com/board/sho...9787&p=3669787
https://www.r3vlimited.com/board/sho...9787&p=3669787
Last edited by mixalive; Sep 25, 2018 at 12:36 PM.
Thread Starter
Safety Car
Joined: Dec 2009
Posts: 4,363
Likes: 429
From: Birmingham Al
Its easy to make a smoke tool to test for vacuum leaks with a quart can, aquarium pump, tubing and a cigar. Search up on utoob.
https://www.r3vlimited.com/board/sho...9787&p=3669787
https://www.r3vlimited.com/board/sho...9787&p=3669787
