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Author: Subject: Starter not turning engine over
RK

posted on 10/9/11 at 01:12 AM Reply With Quote
Starter not turning engine over

When I put the +ve to the starter (there are a ton of wires in this car), and I am sure it's the correct one, all I get is a "thunk", which sounds a bit like a relay is connecting, but nothing else happens. Ideas? I am nervous about blowing up my $3000 ECU. I apparently wrecked the original one that came with the engine.
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LBMEFM

posted on 10/9/11 at 01:28 AM Reply With Quote
You don't mention what engine/car you have, my first suggestion would be to put the car into gear, handbrake off and rock it to see if the engine turns over and is not siezed or that the starter motor has not jammed. If ok then remove starter and connect it up on the bench to see if it functions alright. Then check engine earths and wiring connections. By the way that must be one heck of an ecu at $3000.
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RK

posted on 10/9/11 at 01:41 AM Reply With Quote
AEM. The computer was $2200 plus tax and then another $950 actually for the dyno, so actually more than what I said. The engine (CA18DET) is not seized, as it was running well before I decided to rewire everything.

This is so stupidly expensive, I'm embarrassed. I could have had a nice Cayman S for not a lot more than this thing.

[Edited on 10/9/11 by RK]

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Macbeast

posted on 10/9/11 at 05:19 AM Reply With Quote
Maybe the thunk is the solenoid pulling in as normal but you don't have the heavy battery to starter feed connected. The solenoid acts like a relay. There should be a thinnish wire, maybe on a spade connection, to one starter terminal and a heavy cable from the battery to a stud on the solenoid to give the actal starting current. Then there is normally a short connection from the solenoid into the starter body itself.





I'm addicted to brake fluid, but I can stop anytime.

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pekwah1

posted on 10/9/11 at 07:41 AM Reply With Quote
yeh the thunk sounds like it's probably the solenoid. You need to look at why the motor isn't doing anything.
Check the wire between the solenoid and the motor.

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rusty nuts

posted on 10/9/11 at 11:48 AM Reply With Quote
Check the battery is fully charged and has a good connection to the engine earth and the starter solonoid. Might also be worth taking the starter off and bench testing as already suggested.
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RK

posted on 11/9/11 at 02:08 AM Reply With Quote
Low battery, bad earth. Got it! Started no problem. Well there was another big problem but not electrical.
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