R3V Homies -
I'm hoping to get a recommendation from you guys for a shop in the Puget Sound region to diagnose a long, ongoing (odd) issue my car has.
The issue: at moderate/heavy to wide open throttle my car will often choke, cut out, and then come back to life after a split second or two above 4k RPM's. The revs completely die off, and then it jolts back to life pretty hard. I've had several, (what I deem to be) knowledgable M20 folks drive and diagnose the issue and no on has been able to figure it out. The CEL does come on when it cuts for that split second or two, then vanishes. Some time ago we tried doing a stomp test which came back as a fuel pump issue IIRC. We swapped a different fuel pump with no change.
Some quick details on what I'm working with:
I've heard good things about Accuracty Automotive in Gig Harbor, however it is really tough for me to get down there with a newborn at home.
As mentioned, this has been a tough issue to diagnose, with several local folks giving it their best effort. Does anyone have a recommendation?
I'm hoping to get a recommendation from you guys for a shop in the Puget Sound region to diagnose a long, ongoing (odd) issue my car has.
The issue: at moderate/heavy to wide open throttle my car will often choke, cut out, and then come back to life after a split second or two above 4k RPM's. The revs completely die off, and then it jolts back to life pretty hard. I've had several, (what I deem to be) knowledgable M20 folks drive and diagnose the issue and no on has been able to figure it out. The CEL does come on when it cuts for that split second or two, then vanishes. Some time ago we tried doing a stomp test which came back as a fuel pump issue IIRC. We swapped a different fuel pump with no change.
Some quick details on what I'm working with:
- Super ETA "Stroker" M20 with a refreshed "i" cylinder head and all suppoting components (intake manifold, AFM, throttle body, ICV, 173 SSSQuid chipped Bosch 173 DME)
- The car had the same, unique issue before the "i" cylinder head upgrade
- Bosch 1.3 Motronic engine management (even replaced the engine wiring harness)
- 19# 4 pintle injectors
- All new ignition components (Ignition coil, plugs, wires, distributor cap, spark plugs etc.)
- New fuel pressure regulator
- New throttle position sensor
- New crankshaft position sensor
- I've tested four different AFM's, and three different 173 ECU's, all have zero effect on this issue
I've heard good things about Accuracty Automotive in Gig Harbor, however it is really tough for me to get down there with a newborn at home.
As mentioned, this has been a tough issue to diagnose, with several local folks giving it their best effort. Does anyone have a recommendation?
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