Yeah those old plastic line are so fragile.

 

@vjsimone: Yes very fragile.
They are dry and brittle.
Plus the fact that it was 32 degrees yesterday did not help.
As I was changing the plugs I could hear them breaking.

I'm ordering silicone vacuum line as we speak so I can rid myself of this crap.

 

If your EVP was previously replaced with an aftermarket sensor, the shaft could be ever-so-too-short.

Temporarily epoxy a piece of a matchbook cover to the tip of the shaft and retest. (Basically extending the shaft length.)

 

If the line to your Thermactor is faulty, it could be the cause of your #44 Code.

 

Whats the condition of your EGR-Valve ?

 

I agree about the code 44.
That's what led me to a thread on another forum about getting rid of the hard plastic lines.
I'm not sure if the EVP is a replacement or not, I'll check tonight.
The EGR looks good but????
Here's the only pic I have of that side of the engine.

 

Check that vacuum canister on the passenger fender well that look like a coffee can. It can get pin holes on the bottom by the mounting bracket. Mine was sound, but the grommet going into the end of the canister was dried out and hard, not letting it seal. Some gasket maker smeared all over it and the canister to make it hold vacuum fixed my EGR codes, along with changing the hoses like you are already doing.

 

@bigredtruck: I'll check that too. Thanks

 

Have you removed the EGR valve and inspected it? Old truck like that will have a TON of carbon build up. Not suggesting it's causing any problems you're writing about but removing carbon from that port where the valve bolts on will certainly help, just don't get that crap down the intake.

 

I hate when threads don't get closed out, so I figured I'd close this one out.
I re-cleared all codes and fixed the one broken plastic vacuum line.
Took it for a nice long drive.
Ran like a champ.
Posted the truck on Craigslist and sold it.
I liked the truck but I haven't the time nor the desire to be chasing sensors, valves and other emissions related BS.
The search is on for a pre-emissions truck.
Anyway, thanks for the help on this thread.

 

Thanks for closing it out, I hate that as well.

EFI troubleshooting is not for everyone, it’s time consuming, tedious and quite the learning curve from the pre 80’s models.

Got to luv points & a condenser with vacuum advance… but you still have to deal with the EGR & vacuum lines…..

 

@vjsmone:
Rodger that.
Gas, spark & air ONLy for me!

 

Yeah, have had my eyes open for a 70's vintage 4wd Jeep full size pickup....

 

There's one on Craigslist in NY.