TPI oil pressure sending unit, 91 motor into 88 car - Third Generation F-Body Message Boards

ken0hki · 02-11-2010, 10:57 AM

I am swapping the 350 TPI motor out of my 91 Trans AM GTA, into my 88 TPI 305 Camaro Convertible. I know the wiring harness for the motors are different, and that 88 still used a cold start injector. I am keeping the 88 wiring and using an 89 TPI Camaro 350 computer which has the cold start injector deleted. So I am good on that problem. However, I have two questions that I am not sure about.

The oil pressure sender on the 88 is the older bell style that is next to the distributor. The 91 engine uses the 3 wire combo unit. Does anyone know if I can change the connector and use the 91 style sender with the 88 guage cluster? I don't know if the Ohms are the same for the two senders or not.

Also the 88 motor had a wire coming from the EGR valve, where the 91 EGR has no wires at all. I checked my chiltons manual, and it is the EGR Vacuum Sensor Diagnostic Connector. Is this wire necessary? Or will my check engine light stay on without it? I haven't put the motor in the car yet.

Apeiron · 02-11-2010, 11:02 AM

Why not put an 88 sender on the 91 engine?

ken0hki · 02-11-2010, 04:24 PM

Quote:

Originally Posted by Apeiron

Why not put an 88 sender on the 91 engine?

Because I would prefer to have it in the easier to reach location if possible.

camaronewbie · 02-11-2010, 04:59 PM

It should work fine.

I did the opposite - I swapped in the older sending unit into my 1992 car, and it worked fine, although the older sender doesn't seem to change the reading on the guage as well as the newer one did, it still operates the guage, just not as good of a reaction time.

ken0hki · 02-11-2010, 10:07 PM

Cool I was hoping that I could keep the newer one. That is one less thing I have to worry about .

Does anyone know about the EGR wire on the 88 and if it is necessary? The 91 EGR doesn't have any wires. I was trying to avoid taking the the runners apart.