Runs Rough Under Load

[618 Syndicate]

What is SES? The same as CEL?

Yes. Service Engine Soon.

 

[Schurkey]

SES and CEL are both considered MILs.

MIL = Malfunction Indicator Light. Far as I know, MIL is the preferred term according to the Society of Automotive Engineers (SAE)

 

[stutaeng]

SES = CEL

 

[Essayons]

I battled an issue like this for about two years. replaced everything up to and including the injector spider. was silly of me to overlook this issue for so long but whatever ‍ My issue was the “cam retard“ was about -27 degrees. You do need a scan tool to set it correctly but once I got the timing in spec I’ve never had an issue.

 

[Pinger]

In Blighty we call them EMLs - Engine Management Lights.

 

[Schurkey]

My issue was the “cam retard“ was about -27 degrees. You do need a scan tool to set it correctly but once I got the timing in spec I’ve never had an issue.

The "cam retard" is measured in degrees, but it has NOTHING to do with ignition timing. Timing is taken from the crank sensor, not the distributor/cam sensor.

"Cam retard" is merely synchronizing the cam sensor signal to align with the crank sensor signal. This keeps the computer happy, and it assures that the rotor is pointing to the correct terminal on the distributor cap.

 

[Essayons]

The "cam retard" is measured in degrees, but it has NOTHING to do with ignition timing. Timing is taken from the crank sensor, not the distributor/cam sensor.

"Cam retard" is merely synchronizing the cam sensor signal to align with the crank sensor signal. This keeps the computer happy, and it assures that the rotor is pointing to the correct terminal on the distributor cap.

It fixed mine, apparently the computer wasn’t happy haha

 

[Essayons]

And thank you for clarifying my timing remark. I chose the phrase for lack of being able to explain it as well as you did.

 

[97Yukon4dr]

What is SES? The same as CEL?

Service engine soon

 

[97Yukon4dr]

My bet is fuel regulator and/or MAF.

Fuel reg is hard to test unless you have an O2 code. MAF is easy to test just disconnect and if the problem goes away or gets much better buy a new one.

Ill give it a try