I realize a chip conversation was started in the thread right before this one but I didn't know if people were still watching that one. My question is: If your Mark has, lets say over 120,000 miles on it, would it be a bad idea to chip it now? Just wondering if it would still be worth the money, if the mileage had anything to do with it?
Chip question
- Thread starter mymark93
- Start date
Mileage would be a consideration if you had an unreliable engine...like a Northstar. The Mark's engine are almost indestructible. But prior to installing a chip, you should ensure that your spark plugs are okay, your fuel pump and plug wires are NEW, and run some SeaFoam through the gas tank AND air intake to clean out the carbon.
Lonnie
Blue Oval Chips
It depends on who you get your chip from. A trans with that many miles on it would need to be checked out first. I know most don't so I know what to do in my programming. The trans is what I would be worried about the most. You don't know if it had the TSB done to it for TC shudder. You could give your dealership the VIN and they could look it up for you. It's too late to get it done for free. Chances are with that many miles on it you should drop the pan, take a look at the accumulators, springs and while your in there you could also install the Jmod. The Jmod is basically a valve body recalibration and it includes the upgraded parts that the TSB covered. The only thing the Jmod doesn't cover is the replacement of the TC, fluid flush and trans cooler. You will have to do this yourself.
I also offer the Jmod type kits but more customized to your needs at my website if you don't want to do the drilling yourself. I can give you more info on this if you like also. http://www.blueovalchips.com/index.php?action=category&id=4
The reason I'm bringing this up is because the trans is the most neglected part next to the rear end lube. There were some problems with these early 4R70Ws.
As for the engine, about the only problems they have is the IMRCs sticking, ISC idle air control valve and vacuum leaks.
I also offer the Jmod type kits but more customized to your needs at my website if you don't want to do the drilling yourself. I can give you more info on this if you like also. http://www.blueovalchips.com/index.php?action=category&id=4
The reason I'm bringing this up is because the trans is the most neglected part next to the rear end lube. There were some problems with these early 4R70Ws.
As for the engine, about the only problems they have is the IMRCs sticking, ISC idle air control valve and vacuum leaks.