Gen 4 DiD throttle body problem

[nj swb]

I have an intermittent problem, that's been coming and going for about 4 months.

Sometimes, generally when the day and engine are hot, the engine will shut down rough. When this happens, if I look at my Torque Pro app, the Throttle Position is reported as 100%, where it's normally 6% after shut down. Sometimes, after re-starting, I get a check engine light, and a code for "EGR malfunction" (something like that - I've never actually written it down). The check engine light appears some time after re-starting - not at re-start. It's very easy to clear - issue a "clear codes" through Torque Pro, and it disappears instantly. Engine running, in Drive, no cycling of the ignition.

Given the combination of

• rough shut down
• wide open throttle, and
• EGR error code

I'm guessing that my throttle plate is intermittently not closing on shut down.

Has anybody else experienced this? If so, what was the solution?

Given that I notice the rough shut down, I believe the throttle plate is really not closing.

Given that it's always reported at 100%, I don't think it's even trying to close - if it was mechanically sticking, surely there would be some movement, and the "Throttle" position would be something randomly less than 100%.

So I'm thinking it's a dirty contact in the throttle connection plug, which I've attempted to clean a few times - but the problem still randomly returns.

Any suggestions?

[Alben]

Do you have a resistor installed to prevent the egr operating? Is it easy enough for you to bypass it back to normal and then check your shutdown?
Cheers
Ben

[sharkcaver]

I think I would be pulling the throttle body out and checking for binding or some other mechanical cause at a first instance. A good clean and mechanical inspection would be my first port of call because the electrical side will be a bit harder to diagnose.

I am getting an intermittent fast idle on startup. I suspect my SPVi is at fault, but again, the ultragauge is showing it as working as it should.

[Dicko1]

I think I would be pulling the throttle body out and checking for binding or some other mechanical cause at a first instance. A good clean and mechanical inspection would be my first port of call because the electrical side will be a bit harder to diagnose.

I am getting an intermittent fast idle on startup. I suspect my SPVi is at fault, but again, the ultragauge is showing it as working as it should.

On the unit ..if you peel back the sticker there is a brass adjustment screw. Try turning 1 turn either way and see if this helps. It only adjusts the resistance..

[sharkcaver]

On the unit ..if you peel back the sticker there is a brass adjustment screw. Try turning 1 turn either way and see if this helps. It only adjusts the resistance..

Cheers. Yep I knew that, just haven't got around to it yet. Before I play with that, I will just remove and see if the issue continues.