Bill, When you wrote "remove the 2 screws", where are they located ? Please remember that I consider myself a genius when I refill the oil and wiper reservoirs.......
Lex

 

Pictures are ON THE WAY,,,hang in there! WHEN you said that the RPM went to 1200 RPM and "STAYED" there. do you mean, it wouldnt go past 1200 RPM or do you mean that it stuck at 1200 even if you left off the throttle??



Bill

 

Hi Bill,
When coming to a stop at a traffic light, all the warning signs came up. As the traffic light turned green, I expected to have at least 2000 rpm available. It revved up to 1200 rpm and then just stayed there, irrespective of what I did with the throttle pedal. Even when not putting any pressure on the throttle (idle) the engine stayed at 1200 rpm.
This morning at home I read out all the error codes (see previous message) and re-set them all, then started up the engine and it ran normal. Haven't driven it yet, though.
Lex

 

Lex

Before we get too deep in to replacing stuff and doing repairs, I would like you to check the throttle blade (inside the Throttle Body) for free un-obstructed movement.

Your going to need to need to remove the " complete air box " .. It's NOT as difficult as it seems. Infact, it is only secured in place by FOUR rubber gromets on metal studs.

The first thing you need to do is un-plug the MAF. There should be a retainer that needs to be removed from the top of the connector. Once thats remove the plug can be removed.

Here is a picture of the MAF:




Next, remove the flexable coupler from the Throttle Body (TB) . It is secured to the TB by a large hose clamp. Once the hose clamp is loose, seperate the duct from the TB.

On the air bridge you will see TWO rubber gromets that slide over TWO plastic pins. Pop the gromets off the pins.

At the VERY FRONT of the air box you will see that the front of the air box is secured to the frame by TWO metal pins. The pins slide through rubber groments on the aor box. Use a pry bar or LONG flat blade screwdriver to pry the box OFF the metal pins. Once the box is pried off the two pins, you should be able to remove the ENTIRE air box, MAF, air bridge and flex coupler in one piece.

Once the air box assembly is removed, it's time to examine the throttle blade. Push the throttle blade open with your finger. Its on a spring and should rotate to the semi closed position "smoothly" by its self when released. It will NOT close completly. The PCM tell the TB where to rest when you turn the kay ON. Once you are sure that it moves smoothly, use some spirits (we use carbruator cleaner) on a rag and clean the inside of the TB, the throttle blade, and the back of the Throttle blade.

You should be able to have someone turn the to ON (engine OFF) and press the accelerator peddel and you should see the throttle blade follow smoothly. Make SURE that it doesnt stick when its suppose to open or close.

If the throttle sticks, it will cause that error DTC and put the car into LIMP HOME MODE or Reduced Engine Power.

Here is a picture of the Throttle Position sensor:





Here is the Throttle Drive motor / servo:



Please let me know how the test turns out and if you need any more assistance.

BC

 

Dear Bill,
Many thanks for all your kind efforts; I really appreciate it. I will be on the road for the next few days, but I will have time to open up the hood on Thursday. But, to be honest, the cold sweat is already showing up on my forehead....
Cheers !!
Lex

 

Dear Bill,
I discussed your suggestion this morning with the BeNeLux (Belgium/Netherlands/Luxemburg) Corvette import company in the Netherlands. They were very much interested by your findings and suggestions. They also advised me that they have the complete Control Module on order for me (including all TPSs). Once they have that (early next week) they will pick up my car from Belgium, take it to their repairshop in Breukelen (just south of Amsterdam) and install that module, all at no cost to me. In order not to jeorpardize this offer, I would like to hold off working on the car myself.
Thanks very much for all your efforts, you're top class ! If ever I can do anything for you, let me know !!!
I will keep you posted on progress. Stand-by for that !!!
Lex

 

LEX

No problem. If it will help them, help you,,,,,have them contact me. I help them fix your car if that will help.


BC

 

So,,,,,,,,,,,,,,,,,,how is your car doing theses days. Did they ever fix it and if so, what did they fine was the defective part/s?

Inquiring minds would like to know?

Bill

 

Dear friends,
Just to let you know the rest of the story. After all the hasstle the BeNelux Import company decided to replace the entire "body" at nominal cost and transfer back to me all the cost of previous (unnecessary) repairs that I had already paid. Since that "body" was replaced, the car has been running like new. Meanwhile, annoyed by the whole thing, I had already bouht (and taken delivery of) a brand-new 2008 C6 (with all options). However, since the C5 is running so smoothly now, and I normally drive my car for around 2500 miles/week, I decided to not sell the C5... So now I drive the C5 for a week, then the C6 for the next.....
Now a happy Corvette "fleet-owner"
All the best
Alex