3200 hot start and fans

[saintetienne]

Further information

Well I don't use the rear seats that much anyway - could be a start !

I have a development following todays tests , battery is cool , tested this morning and it is as new . Ran car for some time and let it get throughly hot but fans not on, turned off and restarted as it should. Then I left her ticking over for a further 15 mins with fans cutting on and off , waiting till gauge was reading 90 and fans were running flat out . Then shut car off (fans still running) tried to start and she turned over good as gold but wouldn't fire , then I waited till fans cut out and she started straight away . Next I repeated this but when I turned car off to restart I removed fuse to stop fans running and again not starting I waited for about 3 minutes put fuse back and fans had turned off and she started instantly . So next thing for me to try - probably over weekend now is check voltage when cranking with fans on and off , also to remove and check resistor for internal short as suggested by Catman and Lorenz - oh and check cranshaft sensor gap ! Thanks to everyone for the input and I will keep this updated .

 

[saintetienne]

Moved the crank sensor in slightly to close gap somewhat , seems to have improved things , don't know if problem is totally eradicated , but things appear better so far.

 

[alfatwo]

You dont think It's a ECU default setting thats stops you starting the engine again until It's cooled down a little
just a thought....

Dave

 

[allandwf]

^ I thought that was normal, never tried it in mine, just rings familiar from past conversations.

 

[saintetienne]

I had thought that and you may be right.The only thing that makes me think otherwise is that if the car is really hot it can continue for several minutes after shutdown, obviously rendering vehicle immobile !
I think it is possible that cars have had this problem/feature as built and Maserati where not actually fully aware of it .

 

[CatmanV2]

I can't really see any logic in it. If the car is 'too' hot, then surely you'd have it shut down, even if running.

Stopping it starting simply doesn't seem to add anything.

C

 

[saintetienne]

I totally agree , but the tests I have done and other feedback seem to indicate it is likey in built , whether it was actually designed as such or just ended up as such without realisation at the design stage is the question

 

[CatmanV2]

I totally agree , but the tests I have done and other feedback seem to indicate it is likey in built , whether it was actually designed as such or just ended up as such without realisation at the design stage is the question

A reasonable argument

C

 

[Contigo]

Are you sure this isn't a starter motor issue? We all know just how much extremes of hot, cold, pressure they are subject to in the Vee of the engine and so I wouldn't at all be surprised that as the thing gets too hot from an idle this heat is exacerbating the underlying problem.

 

[CatmanV2]

Are you sure this isn't a starter motor issue? We all know just how much extremes of hot, cold, pressure they are subject to in the Vee of the engine and so I wouldn't at all be surprised that as the thing gets too hot from an idle this heat is exacerbating the underlying problem.

Now that sounds far more like an idea worth exploring, but the starter (apparently) is turning the engine over?

C

 

[Tompelli]

I have never experienced starting issues, apart from dead or dying batteries. I have experienced the "it will not start with the fans running" & always accepted it as an un-interruptible shut down sequence. If only could find CTRL alt delete.

Sent from Nokia 920 using Tapatalk

 

[saintetienne]

Are you sure this isn't a starter motor issue? We all know just how much extremes of hot, cold, pressure they are subject to in the Vee of the engine and so I wouldn't at all be surprised that as the thing gets too hot from an idle this heat is exacerbating the underlying problem.

I had thought that previously , but the starter is good and the car turns over like billio , also my test ruled that out as they moment the fans cut (or would cut out - when fuse was removed) the car fires instantly .

 

[ledlights]

Hi,

I've just had a thought. Although I've never had the symptom you describe, the only time my car refused to start was when the Ecu and fuel pump relays were getting old. Could there be a voltage drop issue causing one of your relays not to fully energise?

Hope this helps,

Steve

 

[saintetienne]

Hi Steve ,

Could be worth a look , as you say this is the time when max voltage is being drawn , could it be that when relays are already energised ie car is running there is not a problem but when they are required to start they can't because of voltage draw elsewhere ? good call , incidentally where are the relays situated ?

Cheers ,

Steve

 

[ledlights]

Steve,

They're in the boot, just above the battery. Off hand I can't remember which ones they are but I can go and look later if you'd like. They're just pretty standard Bosch parts and were about a tender each from memory.

Regards,

Steve

 

[saintetienne]

thanks Steve , will check them out .

 

[Contigo]

I found this on another forum and could explain it.

"Hi Bernard, I suffered this problem for months. I tried everything and changed everything. The issue turned out to be an incompatibility between my oil filler pipe which was stock 99 3200GT and the new style 4200GT?? crankshaft position sensor which is all you can get these days. The new crankshaft position sensor has a long straight taper behind it, presumably to keep the cable intact for longer. Unfortunately this fouls on the old 3200GT oil filler pipe and pushes the crankshaft sensor out of alignment whilst stressing the cable and sensor at the same time. The problem was at its worst when the engine heated up. I changed the oil filler pipe, changed the crankshaft sensor. It has worked. Supposedly the oil filler pipe can be modified with a hammer or a vice if you are good at metal bashing, it will save you £80 or so."