Still really slow....

[gothicsera]

I've fixed a few little issues with my truck ('95 350 TBI), but it still feels slow. Almost like it's bogging down. But other times it seems to pull much better.

It's had a full tune up in the last 200 miles (plugs, leads, filters, cap, rotor, fluids) and I've cleaned the throttle body. Both injectors seem to be working OK.

After driving for a few miles the SES light comes on with an EGR fault. Can I simply unplug the EGR solenoid to see if it makes a difference?

All vacuum hoses look OK, no vac leaks anywhere. Compression is 170-175psi across all cylinders.

Anything else I should look at?

I don't want to throw lots of money at it as I'm going to swap the motor for an LM7 fairly soon.

 

[Biggershaft96]

I've fixed a few little issues with my truck, but it still feels slow. Almost like it's bogging down. But other times it seems to pull much better.

It's had a full tune up in the last 200 miles (plugs, leads, filters, cap, rotor, fluids) and I've cleaned the throttle body. Both injectors seem to be working OK.

After driving for a few miles the SES light comes on with an EGR fault. Can I simply unplug the EGR solenoid to see if it makes a difference?

All vacuum hoses look OK, no vac leaks anywhere. Compression is 170-175psi across all cylinders.

Anything else I should look at?

I don't want to throw lots of money at it as I'm going to swap the motor for an LM7 fairly soon.

Its probably just a dirty egr valve. Try pulling it off and cleaning it because if you unplug it, it still wont run right until its tuned out.

 

[gothicsera]

The solenoid or the actual valve itself?

 

[jkeaton]

The valve itself is what gets dirty/plugged.

 

[gothicsera]

Pulled the EGR valve off and it looked to be clean/clear. Apply vacuum and it opens ok. Ports in the head are clear too as far as I can feel.

I pulled the vacuum line off the valve and can't feel any vacuum on it with the motor running, so I assume the solenoid isn't stuck open.

So no further in finding the source of the EGR fault code.

 

[Big D]

one of @someotherguy very informative posts

all you can handle for code 32

http://www.chevytalk.org/fusionbb/s..._session_id/441d538a02053e41c171a4c04da3ab1a/

 

[gothicsera]

Very helpful, thanks for that... will have a play around and see if I can trace the fault.

It might be nothing to do with the truck running like crap, but it's worth a shot. Like I said I'm not going to throw a lot of money at this motor as it will be coming out in a few months anyway.

 

[mars2878]

any updates??