Hi John,

Just a quick note as it is late for me.

I was tinkering around on my 1993 tonight and noticed it does not have an EGR valve.
My eighties cars do not either.
The ‘93 car originally came up from Arizona from a hertz rental to a corporate entity.
The PO got it from them or Hertz themselves and later moved it up to Reno Nevada.
It was from them I purchased the car in 2017 and brought it into California. It cleared the smog testing and title requirements just fine.
I never had a CEL on this car so I don’t know if it would give me one. You just cannot look at a menu screen as they are before scanners like OBD II. OURS are classified as OBD I that made things wonky as far as any standards went with a blinking light in an instrument cluster even.
The EGR signal was added in a minimal manner then it was setup to bring in customers to get maintenance every two years or so. Then came headaches if you have a light on for a loose gas cap!
Cars have alway been a luxury elsewhere but us Americans never gave its “due recognition” as the masses of them covered our roads.

If I get time I will check my 1991 that has an EGR. I seem to remember it has a 931. It has always been a California car according to records the PO had.

I also have a 1992 California w/ automatic transmission.
It’s the only one I have as the others are all stick shifts.
I used to think it was a transmission thing with ECUs.
But apparently it’s more of what is sold what state . A DMV-VIN entry thing.
You are cleared on that so the engine is just a swap out. IMHO
It can have an EGR or doesn’t just as long as it passes emissions and inspection.

Rapid RPM changes of a stick shift causes emission issues. Some brands are no sticks shifters but paddle shift automatics sneak through.

What is the status of your engine number or codes versus years have over the body codes?


I do not access to it until it’s closer to winter time as I turn into an anti-rain bird.
So I looked into the numbers on the ECU and it is definitely a 951 ECU.
The adding an EGR might make a tuning conflict if not done correctly.

Got sleepy got to stop.

Later
Phil