Opti Problems
Thread Starter
Instructor
Joined: Jun 2006
Posts: 195
Likes: 0
From: Canyon Country CA
Opti Problems
I washed my engine at the car wash yestarday. I was carefull to avoid direct spray of the opti but apparently not carful enough. I didn't think I was going to make it home. I live in So Cal (dry) and was hopeful things would dry out over night. No dice! I went for a drive this morning and while not quite as bad as yestarday afternoon, still not good. The engine seems to just stop intermitantly. It always fires right back up but it may or may not make enough power to drive. Is there a short term fix to buy some time to replace the opti?
I've only had the car a couple of weeks and am planning to replace the opti with one of the more robust soulution but I'm not quite ready.
Can you squirt a water displacing lubricant into the drain hole? Any suggestions will be appreciated tremendously!
Thanks in advance!
I've only had the car a couple of weeks and am planning to replace the opti with one of the more robust soulution but I'm not quite ready.
Can you squirt a water displacing lubricant into the drain hole? Any suggestions will be appreciated tremendously!
Thanks in advance!
Instructor
Joined: Apr 2005
Posts: 120
Likes: 0
From: Port Angeles WA
I didn't have any luck with the water displacing sprays. I'm not sure if there's anything you can do once you get the inside wet. Placing a hair dryer on it with warm air blowing over it may help??? I didn't try that. In the end I replaced the opti. Good luck!
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
I ain't the opti... you have wet wires.
I had it happen to me, but not because I washed the engine - but because I got stuck in a bad assed rain storm... and washed out the front end...yuck... however, it didn't run well for several hours after the hit. I sprayed some WD40 down there and it helped a lot.
it took 15 months before the damage showed internally.
What year is your Vette?
I had it happen to me, but not because I washed the engine - but because I got stuck in a bad assed rain storm... and washed out the front end...yuck... however, it didn't run well for several hours after the hit. I sprayed some WD40 down there and it helped a lot.
it took 15 months before the damage showed internally.
What year is your Vette?
Thread Starter
Instructor
Joined: Jun 2006
Posts: 195
Likes: 0
From: Canyon Country CA
My car is a 93 with 38K miles.
I'm sure things are dry by now. I't damn hot here in So Cal with low humidity.
I just returned from a 60 mile round trip on the freeway. The car ran pretty good outbound. Different story comming back. It was missing so bad I wasn't sure I would make it. The check engine soon light has come on a few times but I have yet to pull the codes. I don't have a scan tool yet. Is there a way to get the codes the old way?
Thanks for the help!!!!
I'm sure things are dry by now. I't damn hot here in So Cal with low humidity.
I just returned from a 60 mile round trip on the freeway. The car ran pretty good outbound. Different story comming back. It was missing so bad I wasn't sure I would make it. The check engine soon light has come on a few times but I have yet to pull the codes. I don't have a scan tool yet. Is there a way to get the codes the old way?
Thanks for the help!!!!
Race Director
Joined: Apr 2004
Posts: 17,066
Likes: 3
From: Milpitas ca
Originally Posted by ccford
My car is a 93 with 38K miles.
I'm sure things are dry by now. I't damn hot here in So Cal with low humidity.
I just returned from a 60 mile round trip on the freeway. The car ran pretty good outbound. Different story comming back. It was missing so bad I wasn't sure I would make it. The check engine soon light has come on a few times but I have yet to pull the codes. I don't have a scan tool yet. Is there a way to get the codes the old way?
Thanks for the help!!!!
I'm sure things are dry by now. I't damn hot here in So Cal with low humidity.
I just returned from a 60 mile round trip on the freeway. The car ran pretty good outbound. Different story comming back. It was missing so bad I wasn't sure I would make it. The check engine soon light has come on a few times but I have yet to pull the codes. I don't have a scan tool yet. Is there a way to get the codes the old way?
Thanks for the help!!!!
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by ccford
My car is a 93 with 38K miles.
I'm sure things are dry by now. I't damn hot here in So Cal with low humidity.
I just returned from a 60 mile round trip on the freeway. The car ran pretty good outbound. Different story comming back. It was missing so bad I wasn't sure I would make it. The check engine soon light has come on a few times but I have yet to pull the codes. I don't have a scan tool yet. Is there a way to get the codes the old way?
Thanks for the help!!!!
I'm sure things are dry by now. I't damn hot here in So Cal with low humidity.
I just returned from a 60 mile round trip on the freeway. The car ran pretty good outbound. Different story comming back. It was missing so bad I wasn't sure I would make it. The check engine soon light has come on a few times but I have yet to pull the codes. I don't have a scan tool yet. Is there a way to get the codes the old way?
Thanks for the help!!!!
I know what you are saying, but I would be STUNNED if the opti has crapped out from a little water...
oh, and you ain't kidding! It is hotter than hell out there... I am in Torrance, and we are melting here!!!
Thread Starter
Instructor
Joined: Jun 2006
Posts: 195
Likes: 0
From: Canyon Country CA
I just checked the codes....
H72, H33, H34, H44
Code #72: Gear Selector Switch Circuit.
Code #33: Manifold Absolute Pressure Sensor Circuit Low.
Code #34: Manifold Absolute Pressure Sensor Circuit High.
Code #44: Left Oxygen Sensor Circuit Lean.
Not particularly definative? The MAP issues may come from the gas pedal gyrations trying to get the thing to run.
H72, H33, H34, H44
Code #72: Gear Selector Switch Circuit.
Code #33: Manifold Absolute Pressure Sensor Circuit Low.
Code #34: Manifold Absolute Pressure Sensor Circuit High.
Code #44: Left Oxygen Sensor Circuit Lean.
Not particularly definative? The MAP issues may come from the gas pedal gyrations trying to get the thing to run.
Last edited by ccford; Jun 17, 2006 at 08:19 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Pro
Joined: Jan 2005
Posts: 579
Likes: 0
From: Denton Texas
Here are the codes for my 95. Not sure if they are the same.
H33 - (MAP) Sensor Circuit - Signal Voltage High - Low Vacuum
H34 - (MAP) Sensor Circuit - Signal Voltage Low - High Vacuum
H44 - Bank 1 (Left Front) (Ho2s) # 1 Circuit (Lean Exhaust Indicated)
H72 - Vehical Speed Sensor Loss
H33 - (MAP) Sensor Circuit - Signal Voltage High - Low Vacuum
H34 - (MAP) Sensor Circuit - Signal Voltage Low - High Vacuum
H44 - Bank 1 (Left Front) (Ho2s) # 1 Circuit (Lean Exhaust Indicated)
H72 - Vehical Speed Sensor Loss
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by ccford
I just checked the codes....
H72, H33, H34, H44
Code #72: Gear Selector Switch Circuit.
Code #33: Manifold Absolute Pressure Sensor Circuit Low.
Code #34: Manifold Absolute Pressure Sensor Circuit High.
Code #44: Left Oxygen Sensor Circuit Lean.
Not particularly definative? The MAP issues may come from the gas pedal gyrations trying to get the thing to run.
H72, H33, H34, H44
Code #72: Gear Selector Switch Circuit.
Code #33: Manifold Absolute Pressure Sensor Circuit Low.
Code #34: Manifold Absolute Pressure Sensor Circuit High.
Code #44: Left Oxygen Sensor Circuit Lean.
Not particularly definative? The MAP issues may come from the gas pedal gyrations trying to get the thing to run.
Remove the harness for the MAP (its the little box thingy on top of the intake, right side), and clean it out.
Start there.
Thread Starter
Instructor
Joined: Jun 2006
Posts: 195
Likes: 0
From: Canyon Country CA
Thanks! I removed the connector and the MAP transducer. I did not see anything wrong so I re-installed and made sure to firmly connect. I started the car a reved a few times and it sounded crisp. I'll have to wait till tommorw for a test drive due to wifely responsibilities. I'll keep you posted.
