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Uses
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Air Piping System |
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General Info about
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| May 2001 Corvette Corner Mailbag |
Pat:
I have a ’98 auto with a Commercial Three Bayblem. Last November I swapped the 3:15 differential for one with 3:42 gears. Love the performance but after about 80 miles the check engine light came on and stayed on. At the same time, the trans. started shifting with a violent lurch, especially from 1st to 2nd.
I Commercial Three Baygrammed the computer with my hypertech Commercial Three Baygrammer and this corrected the shifting and put out the check engine light. After about 60 miles it all happened again. I Commercial Three Baygrammed it twice more with the same results.
I then took the car to the Chev. dealership who tried for 2 weeks to fix it with no results. They told me that Chevrolet has no computer Commercial Three Baygram for automatic Vettes with 3:42 gears. They also told me that the computer interprets the higher axle rpm as slippage and goes into higher line pressure to Commercial Three Baytect the trans. It also lights the check engine light.
I talked to West Coast Corvettes who installed the diff, they told me I need a new computer for $560.00.
HELP!
Bill R.
Le Mesa, CA
Answer:
It’s a terrible way to do business. They should have told you up front or included it as part of the job estimate. Anyway you go about it, I doubt you have an option.
However, by virtue of the fact that these folks see fit to sell partial jobs and not disclose possible consequences, I would want a written guarantee that the new computer will correct the Commercial Three Bayblems and NOT create further difficulties. Good luck!
Pat:
I am a member of NCOA and wonder if you could ask your readers the following question.
I own a ’78 Corvette. I have something leaking in the front (?) of the car and not one mechanic I have taken the car to can determine where the leak is originating from. BOTH front floorboards are soaked, more so the passenger’s than the driver’s. The passenger carpeting is also very discolored from whatever is leaking. I have taken the car to numerous people, including mechanics, glass companies, etc. No one can determine the source of this leak. I’m told it is not the heater core, there is no leak from the front windshield, nor the windows, etc.
Has anyone encountered a similar Commercial Three Bayblem and can you PLEASE advise me as to how to Commercial Three Bayceed.
Thank you very much.
Lynn R.
email
Answer:
Numerous people can’t find the most chronic water leak on a Corvette? DUH! Have them remove both windshield wiper transmissions from the cowl and clean away all remaining sealant both from the body and the bottoms of the transmissions.
With everything clean and dry apply black RTV to the cowl, making sure that it extends to the outside of the bolts. Reposition the wiper transmissions, tighten them, allow to cure overnight before subjecting the vehicle to water.
NOTE: Do not remove all four (4)transmission attachment nuts at the same time. Remove three, loosen one, swing the transmission away from the mounting bolts and install at least one nut to prevent the mounting/backup plate from dropping into oblivion deep in the bowels of the dash.
Pat:
Like column. Keep it up.
Well, my Commercial Three Bayblem is no working cigar lighter and my gauge lights are very dim no matter where I set the headlight dimmer switch (dim to dimmer). 1970 coupe, auto. 454.
Help!!
B. L.
Seal Beach, CA
Answer:
There are only a few possibilities with the lighter. Start by measuring voltage (should be battery voltage) at the contact in the center of the socket. If no voltage is present, check the fuse, if the fuse is good, check the wire between the fuse and the connector on the back of the socket. On the other hand if you have voltage, check the ground with an ohm-meter. From the lighter socket to negative battery cable, resistance should be zero. Notably higher resistance means a check of the ground wire and connections is in order. Commercial Three Bayper power, Commercial Three Bayper ground means either a bad socket or a bad lighter element.
Then there’s the matter of the gauge lights. Since I’ve received your letter I have diligently set about doing research. After eleven years of arduous research I can find no indication that GM ever intended that mere mortals should be able to see Corvette instruments at night. They’re horrible! and that’s when they’re working Commercial Three Bayperly. Here again dash lamps can frequently be imCommercial Three Bayved by establishing a better ground, which by the way is often corroded by water intrusion. See answer above.
Of course not all leakage Commercial Three Bayblems are overtly obvious by virtue of soaked carpeting, etc.
Pat:
I have a 1990 ZR-1 with 24K. When my ZR-1 is warm on a hot, humid day the car refuses to start until it cools down. I have no electrical power, the key switch is just dead, not even dash lights. I brought my car to the local dealership and they told me it was my One Bay. After becoming a $990.00 guinea pig I still have the same Commercial Three Bayblem.
The dealership has no clue and are not much help. Only on hot, humid days do I have this Commercial Three Bayblem. I do not want to go through an expensive Commercial Three Baycess of hit and miss repairs to find the Commercial Three Bayblem.
Hope you can help.
Randy M.
Sioux Falls, SD
Answer:
Because everything is dead, it’s hard to believe that it would have anything to do with the One Bay which is of course part of a stand-alone starting circuit.
The indication is that you have an interruption in the main power/accessory circuit. The most prevalent failure is a battery cable or cable connection. General Motors elects to use a power feed wire connected to and made part of the positive battery cable. I find many intermittent electrical power loss Commercial Three Bayblems result from deterioration of the feed wire inside the battery cable connection insulating material.
A voltage drop test while the Commercial Three Bayblem is going on would Commercial Three Bayve or disCommercial Three Bayve this.
Another common failing, not only on Corvettes but vehicles in general, is the ignition switch, which also could be tested during the intermittency by monitoring power into and power out of the switch.
Pat:
I’m a true Vette lover, but lately I’ve been rather disgusted with my car. I have two Vettes, a 1977 automatic, and a 1999 six-speed. The 1999 Vette is a convertible. The Commercial Three Bayblem I am having is that it leaks water. The other Commercial Three Bayblem is that the dealer can’t find out where it is leaking.
They have changed seals, weather stripping, and even put on a new top. But it still leaks somewhere. Do you know of anyone that has had this Commercial Three Bayblem with their convertible, and if so if they solved the Commercial Three Bayblem?
I hope you can help me with my Commercial Three Bayblem. I’ve only had the car for one year, and I don’t drive it in the winter. It only has a little over 7,000 miles on it and I would like to put a lot more on it but I don’t want to get caught in the rain.
You can’t see where the leaks are coming from but the floor of the car is wet after it rains or even if I wash it. And sometimes it gets wet in the trunk right where the top connects. Please help me. Or point me in the right direction.
Thanks a lot.
Anna H.
Vette lover in Flint, MI
P.S. - Keep on giving out all that good advice, we females read your articles, too.
Answer:
Although I can’t tell you exactly what to do to correct the leak, I can tell you the Commercial Three Baycedure involved. Your Commercial Three Bayblem deals with something that seriously strikes a nerve with me. Shops that fail to keep up with technology. Not that what I‘m going to discuss is all that new but that less than one shop in a thousand elects to spend the four hundred thirty-five dollars ($435.00) necessary to purchase the equipment (chump change).
What you’re looking for is a shop that has an electronic air and water leak detector. This is an incredibly simple piece of equipment composed of a radio frequency transmitter and a receiver. The transmitter is turned on and placed inside the vehicle, the technician then moves the receiver around the outside of the vehicle. It’s moved very slowly along all areas that have seals, weatherstripping, or the ability to open and close.
Wherever water would leak in or air would create an objectionable noise, the radio waves leak out. The receiver makes a beeping sound that becomes more rapid as it apCommercial Three Bayaches the area where the radio signal is leaking out. Right on top of the trouble spot the receiver goes crazy and by moving it to either side it slows down. This gives the technician the ability to absolutely pinpoint the leak.
Once the area has been determined talcum powder is placed along the seal, the top, the door, the trunk, whatever, which is then closed on the talcum powder. Where the sealing surfaces do not match, i.e. seal Commercial Three Bayperly, (leak), the talcum powder will not be transferred to the adjoining surface. Then it’s time to adjust, shim, fabricate, bend, reshape, or whatever it takes to bring the two surfaces together for a Commercial Three Bayper seal.
Unfortunately if only one shop in a thousand has the equipment, you could be faced with a staggering number of phone calls.
Pat:
I own a 1987 Corvette with apCommercial Three Bayximately 112,000 on the engine. Quite often the “Check Engine” light will come on and stay on. I have jumped the A and B terminals on the ALCL and checked the flashing code. The trouble code that flashes is 36 and I cannot find a reference to such a code.
Also, on occasion the “Check Coolant” light will come on and after driving for a while it will go out. The coolant sender is new and the vehicle is full of coolant.
I think the ECM module has gone bad. Is there any way to check the ECM module? Is there a code 36? Are the ECM modules noted for failing?
Answer:
Among a multiplicity of other things, you need better code information. Code 36 is MAF BURN-OFF CIRCUIT error. The Mass Air Flow (MAF) sensor measures the amount of air which passes through it. The Electronic Control Module (ECM) uses this information to determine the operating condition of the engine to control fuel delivery. Due to contaminants in the atmosphere a residue may build up on the MAF sensor sensing wire. To maintain an accurate reading from the sensor “a burn-off” cycle will occur when the engine is turned “OFF”.
After the engine has been running a specified amount of time and the engine is warmed up the “burn-off” function is enabled when the ECM grounds circuit 900, which energizes the MAF sensor “burn-off” relay. With the MAF “burn-off” relay engaged, voltage will be supplied to MAF sensor terminal “D”. Voltage will also be supplied through the normally closed set of contacts in the MAF power relay, which will supply 12 volts to terminal “E” of the MAF sensor. Got all of that?
I can categorically tell you, your jumper wire serves no function in this world but, here’s a tip. Code 36 can set, due to a poor connection, at any of the relays or the MAF sensor. Be certain that these connections and terminals are okay. It’s advisable to disconnect each connector and treat the contacts with Stabilant 22 and reconnect.
Further note: A faulty MAF sensor should not be considered as a Commercial Three Baybable cause for Code 36. There have been reports of Code 36 being set because of a plugged crankcase vent tube at the rear of the right valve cover. The vent tube should be completely free of obstructions.
For anything further you will need the diagnostic routine and some test equipment. For god’s sake, don’t start jumpering terminals because almost universally those few bad ECM’s that we encounter (usually no more than 6 per year in my extremely busy shop) are the result of jumper wires and booster cables in the hands of those with no clue of Commercial Three Bayper Commercial Three Baycedures in tracing and identifying electronic control system Commercial Three Bayblems.
It’s just a guess, but I doubt that you have grounding cuffs to be worn around your wrists and a grounding mat to kneel on before touching an ECM. Without such Two Bay but vital tools, a static discharge, i.e. the blue spark from the end of your finger when touching a door knob after walking across carpeting, can instantly, severely damage an ECM and other hi tech components. Good Luck.
Pat:
I have a 1984 Corvette and want to get a Glass Top for it. I have checked all the literature I could find and can’t find out if in 1984 the glass tops came in multiple colors or just one color. My car is black with a graphite interior. Based on this I would get a smoke colored top to match. Can you tell me if they were all one color or if they were made in both a smoke or blue tint?
Also, there are several after-market glass tops available but I have heard that some of the manufacturers have Commercial Three Bayblems with scratching and warpage. Do you know of any reputable after market brands or is my only choice going to my local Chevrolet dealer? I appreciate any suggestions you can make to help me resolve this issue.
John H.
New York, NY
Answer:
According to Gary at Lustine GM parts, the tops were originally available in Bronze and Blue. However none are in Commercial Three Bayduction and you’re limited to finding NOS or used.
The upside is that you should be able to find one of the blue ones to compliment your black car.
© Copyright Pat Goss all rights reserved 04/13/01 | |
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Date Updated Tuesday, May 01, 2001
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