Jonas, I'm not good at long distance troubleshooting, but I'd bet you have
an ignition wiring or plug failure at high speed. I have experienced that in
the past on my first BJ8. I replaced the HV wiring and the plugs, and the
problem was resolved.
== Alex in Maine
"The Blue Mainie," 1960 Austin Healey 3000 BT7
"Conkling," 1946 M.G. TC #1321
Former owner 1957 A-H 100-6, 1967 A-H BJ8,
1965 MG Midget
http://home.roadrunner.com/~alexmm
----- Original Message -----
From: "Jonas Payne" <JPayne@ThorCon.net>
To: <healeys@autox.team.net>
Sent: Monday, June 04, 2012 2:12 PM
Subject: [Healeys] Timing Problem?
> Over the past couple weeks, I have been having an issue with what I
> believe to
> be the timing on my AH3000.
>
> When cool, the car runs just fine. However when hot, the car will not rev
> over 4000 rpm and begins missing. At 4500 rpm it misses very badly and
> backfires occasionally.
>
> I pulled the #1 and #5 plugs, and there is no indication that the car is
> running lean. However I have not verified fuel flow from the pump while
> very
> hot.
>
> In my experience if the car is running lean, it also runs hot, and this
> particular car never got above 210 degrees even in traffic last weekend
> with
> temperatures on the road of 130+ (it was 108 in the shade here on Saturday
> for
> a 140 mile run).
>
> I'll test resistance in the coil both hot and cold this evening, I'm
> wondering
> if the advance is "sticking" in the dist. Due somehow to heat?
>
>
> Jonas Payne
> PBR
> Cell: (702) 358-5084
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