I just turned 100k miles on my 96 disco and the dealer inspired Service Engine Light on the right side of the instrument panel came on. Is there a way to turn this light off without going to the dealer? Many thanks!

 

go to an autozone and get the codes read. there is something wrong with your truck. bring the codes back to us.

 

Thanks very much I will do that and get back to you in a day or so.

 

Thanks Hilltoppersix,
I took your advise and had the codes ran. I had 5 come up:
PO125 - temperature coolant
PO30 - random Cylinder misfire
PO303 - Cylinder 5 misfire
P1313
P1316

I had seen the cylinder 5 misfire code during my last inspection and changed the spark plugs and wires hoping to resolve that issue. Guess not. Any advise you can offer is greatly appreciated

 

What plugs and wires did you install before, what octane gas?

 

Disco Mike,
I am in North Carolina and run 86 oct gas. The plugs were Champion Platinum Power with 7mm wires. thanks for your reply.

 

I'll save Mike the trouble: you need to run premium gas. 93's preferable, you can probably run 91 if you can get it. 89's borderline, though some people use it. 86/87 is Right Out.

Run a couple of tanks of that through (and maybe a can of Seafoam additive), and then find some place to get your lights reset, and see what happens. (Some people's testers can reset them, some can't.)

 

Thanks for the information on the gas. Premium it is and a can of seafoam will be in it tonight!

 

Take note: additives that actually *accomplish* something can make things worse... temporarily. Run the additive and a couple full tanks of gas before making any further judgement. I generally put the additive in the take first, on the theory the incoming gas will mix it, but I've heard the other approach suggested as well...

 

you should also get some magencor 8mm wires from apexperformance.com 7mm wires even though they are the OEM size are not enough for our engines.