[V8] Giving up...No it's alive.. Road trip

[Paul DAnneo]

Hello Tony,
 
The compression test shows 120+- accross the board.
Now after the return trip, the plugs all look the same.
The miss seems to be running at idle and steady speeds. WOT it clears up and runs great. 
 
The car would heat up 110c-115c going up hill, then also at construction traffic, slowing down. Maybe a bit warm?
I am planing to change the coolant and the t-stat next week. Any benefit to changing to the pink stuff?
 
There is a new O2 sensor. Bosch 4 wire. Plug and play.
 
Paul
 

From: Tony and Lillie <tonyandlillie1 at earthlink.net>
To: Paul DAnneo <padanneo at sbcglobal.net>; John Gourley <azaudi at gmail.com>
Cc: Audi <v8 at audifans.com>
Sent: Friday, September 16, 2011 3:53 PM
Subject: Re: [V8] Giving up...No it's alive.. Road trip

> ----- Original Message ----- 
> It's melting....
> Sorry, 120c.
> Thanks for correcting
> 
> 
>> You really didn't mean 200c did you? :)
>> 

I was wondering the same.

On the #4 issue, so you have a compression guage? Sounds like it's low,

Is the miss just at idle, or all the time? If just at idle, that indicates more than likely low compression. If it's all the time, there is somehting failing. A misfiring ign in that cylinder will also cause a black plug. Have you swapped the plugs from one cylinder to another?

Green coolant will not cause overheating. There is plenty of chatter on this subject, but it's really only over deposits caused from the green coolant. Either way, that's what I run in my cars. Customer cars get whatever they had. IOW, if they come in with green, they leave with green. If they come in with pink, they leave with pink. With one exception, if they come in with Dex-Cool they will leave with whatever the customer specifies, with the exception of Dex-Cool. I WILL NOT put that in anyones car.

Almost sounds like your thermostat may be sticking. Can you give the situations where it was overheating, i.e. going up a hill, just cruising, sitting at an idle, etc?

Also sounds like it may be time for an O2 sensor. I recommend the 4-wire Ford sensor, 1993 F150 5.0 is what I have. Last I checked it was about $45.

HTH,
Tony