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hmgabriel
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Erratic rev counter movement
hmgabriel replied to hmgabriel's topic in 986 Series (Boxster, Boxster S)
UPDATE The erratic movement increased steadly and now the pointer stay at zero for periods. I had the coils and MAF replaced at scheduled maintenace. Got a OBD cable at 50€ on ebay (ELM323 based) which worked fine with scantool and digimoto lite. On OBD the rev counter works well (so no reading problem, possibly a cluster failure). No error codes either. Next I got a used cluster on ebay with the same color connectors (although a diferent model) but for my surprise it works well except for the rev counter (that is erratic as was the original). Any ideas? can it be a connection problem (cables/connectors)? What to do next? Thanks -
Erratic rev counter movement
hmgabriel replied to hmgabriel's topic in 986 Series (Boxster, Boxster S)
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My Boxster 99 2.5 is about 140 Km. Recently the rev needle started to move up and down erratically for periods (it seems to happen when its wet weather?!) and then it normal again. The engine runs as normal. I understand the signal for rev counter comes from DME, and for DME from cramshaft sensor (is this the pulse sender?). I think it might be a display problem or poor connection, DME problem or a sensor problem. Any ideas about making a diagnosis? Thanks
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Same problem a few months ago. I had to dismantle central console: unclip two side panels in front and two in the back. Unclip the gear lever cover. Remove ashtray and unscrew two screws at the bottom. Remove bottom cover at console door and remove three screws. Unclip panel on side of hand brake. Lift the center console and find the switch. A little multiuse spray (WD 40) does wonders.... Hope it helped.