My son purchased a 1987 Cherokee Laredo last year and were slowly making improvements to get it back on the road. Recently replaced several vacuum lines due to the previous either being missing, broken or very brittle. i have one vacuum line that I believe goes to the EGR Valve. The EGR valve that is currently on the vehicle appears to be broken only the part with the two mounting bolts remains, the valve itself is missing. I found a replacement on Autozone for about $80.00. I was wondering if anyone knows if the 1987 has an inducer or another part that connects to the EGR Valve or if its just the vacuum line that plugs directly to the EGR? Im finding this Jeep has several missing parts as we go further in but just curious if i should be looking for that part as well or just EGR. Also ive read some posts about eliminating the valve completely, Since this vehicle already needs a replacement i may just decide to bypass it if there is no reason to replace. If so does anyone know where i can purchase a plate or what i can use to plug up the area where the EGR goes?

 

Yes, the "stock" EGR has a transducer. The EGR solenoid connects to the transducer, the transducer then connects to the EGR valve. Sounds like the diaphragm broke off.

Here's what a new one looks like and the one in my '88.





The EGR at Autozone is likely for the 4 cyl. Can't say it won't work as intended. I don't recall anyone actually trying it (lot's of discussion though).

As for blocking it, you can use the mounting flange as a template and cut one out of some thin steel plate. You could also fill the cavity in the flange with JB weld after getting all the other parts out it. However, I must include doing so is a violation of Federal/State law unless it's for "off road" only.

 

thank you for your reply and info provided. The picture you show is a bit different from what's on AutoZone's website, your probably correct about it being for a 4 cylinder. The one they have only has one nipple for a vacuum line whereas the one you showed has two which both go to the transducer. Doesnt look like a transducer is available either.

smog testing isnt required where im at but id rather replace to the way it was intended. Any idea where i might find an EGR and transducer?


thank you in advance

 

Sadly, these don't seem to be available new anywhere. The parts guide show a different part number for the '87 vs the '88-'90 although I don't know what's the difference. Check out eBay and any nearby salvage yards.

If you haven't been there yet, check out Cruiser54's website at https://cruiser54.com/

Under the Technical Manuals section, you'll find the factory service manual and the Renix Fuel Injection manual. It will explain the operation of the transducer.

The 4 cyl and 6 cyl EGR gaskets are the same so the holes should line up if you want to try the 4cyl one.

Possibly, Cruiser54 may have a used one in his stash of parts.

 

Mlopez, do you live in a state that requires smog checks?

Can you provide us a picture of your current EGR?

 

smog testing is not required where i live. Ill get a pic this afternoon. Basically all that is there is the cast iron looking piece that mounts with the two bolts. Everything else is gone (transducer and upper half of EGR)

 

heres a pic of what i have

 

Are you getting any kind of exhaust leak out that hole? I don't see the tube that comes out of the base to connect to the bottom of the transducer.

Here's a view from under the valve. Note the tube circled in red.

If it's not broken off perhaps the previous owner already swapped to the 4cyl one?

 

Is the tube from Exhaust to intake there?

 

no tube at the bottom it’s very likely it was switched at some point. I’m also missing the transducer and tube

 

doesnt appear to be there

 

The 4 cyl EGR does not use the transducer. It connects directly to the EGR solenoid. The solenoid is mounted on the inner fender, driver side, See the pic below (circled in red). To the right is the ballast resistor. To the left is the fan relay.



The tube Cruiser54 is asking about connects the intake manifold to the exhaust manifold. It connects to the intake just below the EGR. From your pic, it looks like it's there.

 

It's likely it's been eliminated.

 

stand corrected the tube from intake to exhaust is there, verified this morning

 

wondering is there a proper way to bypass the EGR valve until i can source the parts from a junkyard? The Cherokee does run but not sure if theres a better way than what i currently have set up?


thank you
ml