thirteeneast

Hello,

Any thoughts or help appreciated.
I've read all similar posts on every 911 forum known to mankind and anyone with similar fault never posts back the outcome :-(

Drove car few days ago (2001 996 carrera 4 tip)
Car had no fault codes and still has no fault codes (Durametric)
Tried to start and no crank just clunk from starter soloniod.
Checked starter relay all volts and ground when and where they should be, fuel pump relay too.
Checked earth straps
Checked ignition switch
no clutch switch it's a tip.
Tried without RFid transponder in key, no clunk from soloniod so presumably immobiliser all correct (alarm LEDs status =normal).
Only thing that bothers me before following my gut and buying a new starter motor is when I tested at my fuel pump and ignition on I saw no volts as if to prime pump?
I thought it would do the before trying to crank.
Is this correct till CPS detects movement or am I missing something?
Or does it look more like the fault is the CPS.
Ideas?

Thanks.

TexSquirrel

Just a clunk doesn't sound like a fuel pump to me.
Also a bad CPS won't prevent the engine from turning over, unless the engine is locked.(i.e. hydro locked due to leaking fuel injector)
Check the voltage when you try to crank it and you hear the clunk.
Is it still 12V, or does it drop down much lower?
A low battery, or battery cable, will give you 12V until you put a large load(i.e. Starter) on it and then it will drop down much lower.

thirteeneast

Yep forgot to add battery is new.
no drop off trying to start.
​​​​​​ Not questioning the pump. questioning the event of not seeing it prime on ignition switch.

Battery is 850cca

Thanks

dan_189

I am no expert but I'd start with the starter - it may have or is just about to turn 18 years old if it's original. Cops a fair bit of punishment and heat due to its location.
​​​​
​​​​​​Even if it was the fuel pump I would assume it would at least cranck but not start?

You've checked all your fuses right?

Ahsai

Check fuses C1-C4 and E1 first. If they are ok, make sure the battery cables are tight on the battery posts.

Ahsai

Does pin 30 of the starter relay have +12v when you turn the key to crank? If yes, with the starter relay removed, put a fat jumper to bridge pin 30 and pin 87 (yellow wires) and then turn the key. If the starter still does not crank, it's likely you have a starter or starter solenoid problem.

5CHN3LL

A clunk and nothing else sounds like a hung starter. If the top starter bolt works loose enough, the starter can droop and engage incorrectly with the flywheel. Never seen this on my 986 or 996, but it's not uncommon - had it happen on my Corvette within the past year or so.

If you have one, you could use a lighted inspection camera/borescope to peek in around the intake hardware and verify that the starter is at least not drooping.

808Bill

Put it in gear and rock it back and forth. Or is it a TIP?

thirteeneast

Thanks Ahsai, that's exactly what I had done, and still hadn't fired so I had drawn the conclusion of starter.
Just bit miffed at not seeing the pump prime.

Thanks.

Ahsai

The fuel pump will only prime for about one second when you turn the key and you should be able to hear that.

I agree that it's likely your starter then since you don't feel any current draw, which would have been the case if the engine is seized up.

thirteeneast

Makes sense, I think it's too quick for my meter to even take a reading.
Typically after removing the starter, when I first put it on the beach and tested it only soloniod worked but after hitting it seems to run 99% of the time but seems kinda lazy.
I'll be back when I know more.
Think I'll just go for new instead and rebuild this one for another time!

Ahsai

Definitely go for a new one from Bosch. Less than $200

thirteeneast

Lol, normally I would but right after Xmas and just bought another new car so it probably won't be
turned out to be a band winding, soloniod was as suspected perfectly fine just the Motor bad.

The Bosch is double that in the UK :-(

Thanks for the help buddy.

dan_189

I bought a new Bosch starter and got my old one refurbished to keep as a spare - the refurb was fairly inexpensive.

thirteeneast

So got a replacement starter, tested it before putting it in.( All good)
Now same thing, soloniod sounds like it throws out but no crank?
battery volts good drop test good
Earth good
Relays good
Fuses good
ignition switch switches relays therefore good.
engine turns by hand and flywheel moves.

Anyone?
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