Does anyone have experience with the Dorman 911-901 as an alternative to the Jaguar EAC7905/Denso 084600-7840?
My car recently began throwing a Fuel Fail 37 code. The EGR valve vacuum tests good (10K miles?). I'll be dipped if I'll pay $175.00 for an out of production solenoid.
because it's out of production. Visually the only difference appears to the connector and since the Dorman part does the same job, I would think the electrical values are the same?
I have no problem with changing the connector on my car's harness to try it so...?

 

Hi Roger,

I don't have any experience with the Dorman part, but the vacuum solenoid doesn't have a difficult job, so it should work fine.

The same part was used in different applications on the Series III, XJS, etc, and on our '93 XJ40 it was also used in the secondary air injection circuit, so it may be possible to find a good used Denso part on eBay.

Have you tested your solenoid? I think it just opens and closes when energized or de-energized.

I assume you've followed the diagnostic flowchart in this manual?

Jaguar AJ6 4.0L Engine Management System / OBDI Diagnostic Guide

Cheers,

Don

 

If the vacuum switch does not eliminate the fault, be aware that the output semiconductor in the ECM could be faulty.

Back in the 1990s (when these cars were 'newish'), I had a customer car that flagged the FF37. I swapped the vacuum solenoid with a good one from another car that was in the shop. The fault REMAINED. I could NOT clear the fault.

I put the solenoid from the FF37 car onto the other car. NO FAULT.

I swapped the ECMs between cars (both 1990MY XJ40 4.0) and the original FF37 ECM flagged the fault in the OTHER CAR!! (the fault followed the ECM)

Customer was NOT HAPPY. Needed a replacement ECM.

 

Thank you fellows,
I checked the EGR valve today, tested fine, olds a vacuum, perhaps 10K miles on it. I will check out the EAC7905 in the next day or so.

Roger