Brandon_Lutz
Newbie
My 95 K2500 has just recently started stumbling under the load and exhibiting a hard start at times.
I noticed the issue popped up after I replaced the EGR valve with a new Delphi unit. I had started to get a CEL after about halfway to and from work every day. I put my code reader on it and saw that was code 32 for the EGR. So I got a new EGR valve and solenoid and changed them both out. Cleared the CEL code out and about a week later my truck began to stumble under load and actually die out a few times. Before the EGR replacement my truck had some hesitation at highways speeds if I went to pass someone or go up a hill some, but it never stumbled or died.
I temporarily capped off the vac line from the valve to the solenoid and the hard start issue went away, however the truck is still stumbling if I get on the pedal and put the truck under load.
It looks like I have good fuel pressure as I have a gauge on my TBI that shows it is a little over 12 psi. If I maniupulate the throttle by hand, the pressure remains unchanged on the gauge. For peace of mind I rebuilt the TBI recently because it still had the factory build kit in it. I also installed a new TPS when I rebuilt the TBI.
Plugs are looking good and I have spark on all the the cylinders. The distributor, ICM, Cap, rotor, wires, coil and plugs were all replaced about a year ago so I'm figuring those are not the issue. Plus I don't see any carbon tracing on any of those parts.
I'm leaning to something maybe wrong with the new EGR valve. Is there any specific test I can run on it to see if it is faulty? As I mentioned, if I plug the line between it and solenoid, my hard start issue goes away but it still stumbles under load. I also checked for vacuum leaks but I have not found any. Also, If I have the truck in park and rev the motor, it does not stumble or die out.
I noticed the issue popped up after I replaced the EGR valve with a new Delphi unit. I had started to get a CEL after about halfway to and from work every day. I put my code reader on it and saw that was code 32 for the EGR. So I got a new EGR valve and solenoid and changed them both out. Cleared the CEL code out and about a week later my truck began to stumble under load and actually die out a few times. Before the EGR replacement my truck had some hesitation at highways speeds if I went to pass someone or go up a hill some, but it never stumbled or died.
I temporarily capped off the vac line from the valve to the solenoid and the hard start issue went away, however the truck is still stumbling if I get on the pedal and put the truck under load.
It looks like I have good fuel pressure as I have a gauge on my TBI that shows it is a little over 12 psi. If I maniupulate the throttle by hand, the pressure remains unchanged on the gauge. For peace of mind I rebuilt the TBI recently because it still had the factory build kit in it. I also installed a new TPS when I rebuilt the TBI.
Plugs are looking good and I have spark on all the the cylinders. The distributor, ICM, Cap, rotor, wires, coil and plugs were all replaced about a year ago so I'm figuring those are not the issue. Plus I don't see any carbon tracing on any of those parts.
I'm leaning to something maybe wrong with the new EGR valve. Is there any specific test I can run on it to see if it is faulty? As I mentioned, if I plug the line between it and solenoid, my hard start issue goes away but it still stumbles under load. I also checked for vacuum leaks but I have not found any. Also, If I have the truck in park and rev the motor, it does not stumble or die out.