95 6.5 turbo intermittent service engine soon light

[Dj Denton]

Hello everyone.
I have a 95 6.5 turbo 1500 that the service engine soon light comes on usually at a stop and then when I slow down. It seems to bog down and shoot black smoke till it boosts then the light goes out and runs great with little to no smoke. I'm at a loss with it. I've changed the pmd, and fuel pump relay. Any other ideas on what may cause this.

 

[Will L.]

Chek air filter. Check good seal on intake tubing from turbo. Any codes?

 

[Dj Denton]

I have a brand new s&b intake on it all nice and tight. When I hook up to code reader says it's not sending anything from the truck.

 

[Husker6.5]

Try the alternate method of code reading with your OBD I truck by taking a paper clip and jumping the terminals in the plug to get the SES to flash. If that doesn't work, odds are that either the ECM or the chip in it are bad. IIRC a code 52 is a malfunctioning/dead ECM.

 

[Dj Denton]

The other thing I have noticed is if I have a load on the truck it doesn't have any issues

 

[jrsavoie]

I'd check exhaust and vacuum

 

[NVW]

Clean the grounds by the trans dipstick, clean them all while you're at it.

 

[JMJNet]

You need to use paper clip on a 95 (OBD-I).
THERE IS NO NEED FOR CODE READER.

The direction is in the Technical Library.