Anyone else having repeated throttle body failures?
 

I had a throttle body fail in january of this year. Yesterday the new one started to glitch just like the old one.

Erratic idle and cruise, and engine revs increasing to 2k-3k when pushing the clutch in with no input on throttle pedal. Cycling the throttle with the engine off, it sounds squeaky and unhappy.

The car has a harrop supercharger and the throttle body is rotated 90deg (black plastic cover faces upwards).

The last one behaved like this intermittently for a few weeks before I finally got stuck in limp mode.

Anyone else having throttle body issues?

I've had similar, also on a Harrop. A few months ago I got stuck in limp mode as well, very annoying since there was no code until then. We noticed a voltage change when jiggling the jumper harness to the throttle but pulling the harness and doing a continuity check revealed no issues and we couldn't repeat the finding after we'd reassembled either. Tried cleaning the throttle body and MAF, no change.

We ended up swapping one of the relays and that seems to have resolved everything but I don't drive the car very often to be definitive. This was the same day as trying some of the other fixes. Just turned off the car, swapped a relay and when it turned back on the problem was gone.

Yes, same here. No codes, just odd behaviour until it eventually goes into limp mode. Fortunately I keep an OBD dongle in the car so I was able to reset it and get home.
Some days it does it on the way home from work. It will start up fine in the morning and not glitch for another week.
I pulled an old throttle body apart and checked the motor on 12v. It sounds ok when horizontal but a bit odd in the vertical position. I wonder if the harrop throttle body relocation causes issues.
The gears were all completely dry, no trace of grease or anything. The shaft for the little idler gear actually had a tiny bit of rust on it.

Sounds like a Harrop problem.
I have had zero such issues running Edelbrock for several years now.
Perhaps Harrop have a solution???

Is the throttle body rotated on the edelbrock?

I’m thinking no but can confirm later today. The alternator was the only component I recall needing re-orientation during the kits install. The kit did include new, longer hoses for the TB coolant supply/return.