95 Yukon 5.7 Liter V8 Hard Starting When Warm

[OR VietVet]

Using anything that is an aftermarket part is a crap shoot. Lesson learned.

 

[Lowufo]

Yeah that is true. Only reason I went that route was so I could get the truck up and running right away but ended up with the wrong part in the end.

 

[JonnyTahoe]

I had a 95 Tahoe years ago. The only code I ever had was for the EGR. Never replaced it because it ran fine. Then after maybe a year it started to run like crap sometimes so I replaced some of the "cheap parts" but still had the issue. Then I remembered the EGR code from a while back. Disconnected the EGR and it always ran fine after that.

 

[haks310]

So how'd it go?

Also have a 95 and replaced the EGR valve and solenoid this Sunday; ACDelco 214-2286 and 214-329 respectively. Also picked up the hard vacuum tubing at O'Reilly for about $7. Three feet was enough to replace all the hard lines. Runs super smooth now.

Had failed smog this past Friday with a high NOx reading. Vacuum tested the EGR valve and it failed. Never threw a code since it never met the EGR testing conditions. Slight stumble at acceleration though. Smogging again tomorrow, we'll see how it goes.

 

[JonnyTahoe]

No smog here.

 

[Lowufo]

So how'd it go?

Also have a 95 and replaced the EGR valve and solenoid this Sunday; ACDelco 214-2286 and 214-329 respectively. Also picked up the hard vacuum tubing at O'Reilly for about $7. Three feet was enough to replace all the hard lines. Runs super smooth now.

Had failed smog this past Friday with a high NOx reading. Vacuum tested the EGR valve and it failed. Never threw a code since it never met the EGR testing conditions. Slight stumble at acceleration though. Smogging again tomorrow, we'll see how it goes.

I haven’t got the parts yet but should have them tomorrow

 

[Lowufo]

Okay well AC Delco EGR came into so I swapped it out and it still throws code 32 Runs great, starts excellent now when hot. I am at a loss why it continues to throw code. Maybe the intake passages are blocked?? not sure. I guess I need to check the new EGR solenoid make sure it is not NFG like the temperature sensor was and check the map sensor as well.

 

[OR VietVet]

I have seen many times where the EGR ports are clogged. If so, time for intake removal and clean them out. Get a good intake gasket set like this:

https://www.rockauto.com/en/moreinfo.php?pk=125383&cc=1166419&jsn=1994

 

[Lowufo]

Yeah if it turns out to be that the old girl can keep throwing the code I have done the intake gaskets on that truck and it is a pain in the arse. At least I fixed the hard start issue .......

 

[OR VietVet]

He who owns the rig gets to make all calls on work for that rig.