Author Topic: Problem with rev / boost  (Read 189 times)

Offline MarkKiss

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Problem with rev / boost
« on: November 25, 2019, 03:53:40 PM »
Last weekend my FC start to be sick :( when I go to RPM without the boost it goes to high rev smooth, but if I put gas more to develop some boost it sounds like a spluttering loose power. Here is video https://youtu.be/clzIR7hZlUk

* My plan is check fuel pump / system and MAF MAP Air leaks but other than that no idea.

any suggestion
Rotary Power

Offline RE5

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Re: Problem with rev / boost
« Reply #1 on: November 25, 2019, 04:30:36 PM »
How does it behave on cold start?   Does the revs bounce at all
?
Current: RX7s   FB S3 & FC S5 Vert

Previously owned:  2 x NSU Ro 80 - 2 x RX7 FB S2 - Suzuki RE5 -Norton Commander - DKW W2000

Offline MarkKiss

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Re: Problem with rev / boost
« Reply #2 on: November 25, 2019, 05:08:20 PM »
Starting cold/hot is perfect every time (engine was rebuilt 10k miles ago) It starts once a week now it develops to be almost every time when boost goes up.
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Offline RE5

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Re: Problem with rev / boost
« Reply #3 on: November 25, 2019, 05:51:17 PM »
A S5 will cut if the Electronic OMP faulty (often connectors to left of alternator) also TPS will shut of boost if faulty, TPS unique to S5, had to change mine as would drop out of boost at 12-15K
« Last Edit: November 25, 2019, 06:09:46 PM by RE5 »
Current: RX7s   FB S3 & FC S5 Vert

Previously owned:  2 x NSU Ro 80 - 2 x RX7 FB S2 - Suzuki RE5 -Norton Commander - DKW W2000

Offline MarkKiss

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Re: Problem with rev / boost
« Reply #4 on: November 26, 2019, 08:57:22 AM »
Thanks, I will check that this weekend aswell
Rotary Power