"Hello,

I'm looking for the electric diagram of maserati 430 biturbo (92).

Could you help us?

Thanks,

Jean-louis Poteaux"

Re: 430 wiring diagrams:

"Check out the reply to the next question!!"

"Enrico:

I need a wiring diagram for my 1991 430 auto, right-hand drive.

Can you suggest a source?

Thanx,

Tony."

Re: 430 wiring diagrams:

Hi Tony,

Try Bill McGrath.

Bill McGrath Maserati
Unit 8
Claggy Road
Kimpton
Hertfordshire
SG4 8QB
England.

Tel: +44 (0) 1438 832161
Fax: +44 (0) 1438 833601

www.classicmaseratis.co.uk

Andy."

"Hi there,

Hi there, has anyone got a sensibly priced sourse of back boxes for the Biturbo 430?

Incidentally I looked into Stainless Steel and was quoted £600 (not fitted) by quicksilver in London.

I have no views as to whether this is good value.. any suggestions?

Durran."

Re: 430 SS exhaust system:

In reply to Durran's question in the 430 QandA section I would say that £600 is about the going rate for the stainless steel exhaust system, I once fitted such a system to my old 430.

I would highly recommend that route as the genuine mild steel items are about twice the price and dont last any time at all due to the angle of the boxes and how the condensation sits in them.

Cheers,

Gareth."

"Hi Enrico,

I wrote a while back saying how my car was acting strangely like a "Kangaroo" etc.

Well, it turn out that after I'd fitted the new leads (one was loose and caused a backfire in the inlet which blew some gaskets) and the Map sensor also the water temp was giving silly read outs all the place.

I have it back now and I never had such a wonderful smooth idle cold or hot it never even hints at being erratic (honestly) and the power take up from idle is so smooth its a pleasure to drive in heavy traffic unlike before at anytime.........

But, it seems to be a bit underpowered to what it used to be. It doesn't seem to have that urgency when you hit the accelerator hard its more of a smoother, more boring build up now, I prefer my old hooligan style 430 of old but its disappeared?!

Can you shed some light on this please? I'd like to go back to the garage that set it up but be able to point them in the right direction as they have never worked on a Maserati before but have worked on Lancia Integrale's which use the same injection system.

Regards John."

"I need a wiring diagram for my 1991 430 auto, rhd.

Can you suggest a source?

Thanks, Tony."

"For some reason the fuel gauge on my 1989 430 goes down rapidly when I drive the car hard over long distances, is this normal? ONLY JOKING.

Actually the guage flickers violently and continually, I suspect bad contacts somewhere in the circuitry, before I start stripping the thing down can anyone tell me if there is a common failing in the sender / gauge assemblies that causes this?

Look forward to hearing from someone, thanks,

Durran."

Re: 430 fuel gauge:

To be honest, there is no particular problem associated with the fuel gauge. It does sound like a bad connection and I would try the connections on to the sender on the fuel tank followed by those on to the back of the instrument before going any deeper, both of which are easy to get to.

Cheers,

Andy."

"What can I do do to tighten up the handling? It's a lovely car but feels a bit daunting sometimes - eg. when on a long, tight radius motorway entry, or when asked to make a rapid change of direction.

Tony."

Re: 430 SE handling:

As far as I know, there are currently no handling kits available for the later Biturbo cars.

All relative I know, but a 430 should not feel like this anyway. Maybe a look at the springs and shock absorbers may be in order.

Also, tyres make a huge difference on these cars and anything remotely sub standard can destroy the handling.

Cheers,

Andy."

"Hi Enrico,

Does the 430 have dump valves fitted? I noticed them on a Saab site as I was looking at their upgraded APC units which are the same ason our cars.

Regards Jenny."

"Hi Enrico,

There are no dump valves fitted to the 430.

Andy."

"Hi Enrico,

My 1989 430 does not run properly, when i start the car it runs very rough as though on 2-3 cylinders and will not rev up at all past 2000rpm missing all the time!

This car is also converted to run on LPG gas, it runs OK when on Lpg gas but the revs will not drop below 2200.

I disconnected the Lpg Power and ECU and the car is the same so its nothing to do with that system.

This all started after i renewed the HT leads as it was fluffing abit at 1900-2200rpm , when i fitted the new leads the car started reacting like a kangaroo! I refitted the old leads and while doing so i found 2 that were broken and hanging on by a strand and tracking to the head a jubilee clip near the distributor, after refitting the original leads the car went like a dream . I drove it back to my home and after 3minutes started the car up to go out again and i had all this trouble...can you help please???

Regards John.."

"Hi Enrico,

Really need more information on this one but:

1. The basic causes of this type of misfire would be either a rotor arm problem, a distributor cap problem, a spark plug problem, an ignition coil problem or a high resistance on the body earth connection at the battery. All of these should be eliminated before looking further.

2. Next, what is the CO reading? Is it high? Is it sooty in the exhaust? What colour were the old spark plugs? If everything suggests rich running then try cleaning the connections for the air temp and water temp sensors on the injection system. You could try renewing if you think you are on to something.

Otherwise, difficult to say without info. In theory, the LPG should not make a difference.

Cheers,

Andy."

"Hi, Recently I had to remove one of my cylinder heads because I had few valves which were bent.

Now I've replaced them and mounted the cylinder head back on again. Unfortunately it is now blowing big bubbles of something in my expension reservoir. I think there's a huge air bubble in the cooling system which I can't seem to get out.

Can you tell me how to get the air out.

Thanks. Best regards, Fred."

"Hi,

Thank you for your reply. The car we are talking about is a Maserati 430 Biturbo.

When the engine gets hot it starts to throw the cooling fluid straight back to the expansion tank. Then there are a few lights burning on my dashboard.

All the hoses of my system get hot, so it can't be my thermostat I suppose. Any case, whatever I do, it keeps on throwing it back to the expansion tank.

Does it always take so long to get the air out?

It can't be the head gasket, because after starting the car the engine runs OK straight away. There's no water in one of the cylinders.

I hope this gives you enough information.

Best regards,

Fred."

"Hi Enrico,

My first instinct is that the head gasket is leaking and blowing gas into the water jacket, fortunately for me I have never experienced this with my maserati, but I have done with other engines. A small leak can allow gas into the water jacket with little or no water getting into the cylinder or the oil, although it will deteriorate soon and become apparent, it may run happily for weeks, However the potential damage to the rest of the engine is serious. Is there any sign of red/rust coloured deposits on any of the plugs?

If it is just a case of trapped air it will help if you can remove the brass temperature sensor fitted in the top of the thermostat housing, if you then take the cap off the expansion bottle fluid and air will come out of the openning. Do this with the engine cold obviously, when there is no more air comming out screw the sensor back in. One other point to note this liquid will run back along the top of the engine block down to the starter motor and out through the bell housing, a little will not do any harm but try not to flood it and dry up the excess were possible. You can assist the process by gently squeezing the radiator hoses to create a pumping action. It is worth noting that the thermostatic valve system permits flow at all times and acts by reducing the ammount which bypasses the water pump. It is basicly fail safe and will not "dead end" the pump, and so a certain flow will be seen.

Also carefully running the engine with the cap off the expansion bottle will allow the liquid in the system to expand without being under pressure and can help get bubbles moving, again take care not to burn yourself nor over heat the engine.

One other area may be the hose conections, I assume that these have been connected in the same positions they came off?

How did the valves get bent?

I hope this provides some ideas or help.

Regards David."