Hoping someone here has some experience with this, it's driving me mad.
1982 grey market 625sci (so technically it's an m90).
I just did a full head job on it, super clean 109k miles car. Installed a reground cam, +1 valves, ported to flow to b35 spec, IE headers.
Car made 210 whp before the mods, runs great except when it hits exactly 5000rpm - it's as if the ignition key was turned off. No matter the gear it's in, what load/throttle (ie AFM/TPS), quick cycle of the key while in gear and it starts and runs as normal. Even does it in neutral.
CPS checks out (owner installed a new one just before the head rebuild), sensors all check out - it's unusual for something like this to stump me, but this one has me.
I did not drive the car past 5k when test driving when it came in, so unsure if it's related to the upgrades.
1982 grey market 625sci (so technically it's an m90).
I just did a full head job on it, super clean 109k miles car. Installed a reground cam, +1 valves, ported to flow to b35 spec, IE headers.
Car made 210 whp before the mods, runs great except when it hits exactly 5000rpm - it's as if the ignition key was turned off. No matter the gear it's in, what load/throttle (ie AFM/TPS), quick cycle of the key while in gear and it starts and runs as normal. Even does it in neutral.
CPS checks out (owner installed a new one just before the head rebuild), sensors all check out - it's unusual for something like this to stump me, but this one has me.
I did not drive the car past 5k when test driving when it came in, so unsure if it's related to the upgrades.
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