Before you do anything, go get your codes read at your local auto parts store and get back to us with the 4 digit code numbers, then we can talk about cleaning the engine.

 

Hi Mike, I took the Disco 96 to the Auto part because of the Check engine and SES lights on and they gave me a large report that includes:

P0130 (02 sensor) Circuit Malfunction ( bank 1 sensor 1)
P0133 02 sensor. CKT slow response (bank 1 sensor 1)
P0300 Random/ Multiple Cylinder Misfire detected.
P0307 Cylinder 7 Misfire detected.
P0305 Cylinder 5 Misfire detected.
P1316 Manufacturer contrl. Ignition System or Misfire.
P0560System Voltage Mafunction.

 

You need O2 sensors and a tune up (plugs and wires).
Do the tune up first. Clear the codes and then wait and see if they come back on for the O2's.

 

First things first, how many miles on your truck?
Take it back to the auto parts store and have them do a load test on your battery and alternator so you can see where your low voltage is coming from, then look at the 02 sensors and then the tune up.
Get back yo us when you find out about your voltage.

 

I want to give you guys a little more inf on my car so the feedback can be better. I placed a new usedengine on the car with 86000 milles. I replaced the engine when cylinder 4 and 6 came out weak after few weeks of buying the car (with 103000 mileage). After replacing engine I started having problems with the "battery" and replaced it few times. I also replaced the Alternator and this issuewas fixedwhen I found your Forum and Ifixed out thevoltage issue after routing correctly the serpentine belt.The voltage on the alternator with the engine on is 14.2 volts. I amrecognized it is a little low but thecar is beenworking OK.The Spark plugs and wires should be ok becauseI paid to get new plugs and wires when placing the "new" engine. Except that the mechanic did not dogood work ontune upjob.
Let me know guys what do you think about the readings.
The car presents Check eng light on and SRS light on all the time.
Chicago is having a beatiful day today.

 

Do you know what the voltage is at the battery both with the car running and not running? The battery may have been drained before you got the alternator fixed and the alternator is not doing a good job charging it.

 

I checked the volts and this is what I found: engine on 14.08 volts by the alternator
and 13.98 across the battery postes.
with engine off the battery reads 12.98 volts.

Thank you.

 

Jairof,
If you get a chance, call me so we can further discuss your trucks issues.
303-862-7680
Colorado before 8 pm any day