Volvo 480 turbo '95 no start

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Baxter
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Volvo 480 turbo '95 no start

Post by Baxter » Thu Dec 23, 2021 12:18 pm

I had problems starting the car. Volvo 480 turbo '95

After received a non fun discharge coming out from the distributor cap I have changed spark plugs, cables, distributor cap that was destroyed and cleaned the rotor. I bought a new rotor and apparently it was the same but didn't fit by an slightest difference in diameter.

Image

The car continue to no start.

I've done a video of what happen.

From minute 4

https://youtu.be/Zd9ii7fkguM

Could it be the system/fuel pump rele or the fuel pump?

I've red another post about the rele problems.
Mine seems to be under the dash.

Image

Thanks

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Jay-Kay-Em
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Re: Volvo 480 turbo '95 no start

Post by Jay-Kay-Em » Thu Dec 23, 2021 12:53 pm

The way that’s cranking and running at the same time, double check your firing order after the lead/cap swap. Keep in mind, flywheel end is number 1.

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jamescarruthers
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Re: Volvo 480 turbo '95 no start

Post by jamescarruthers » Thu Dec 23, 2021 1:02 pm

It sounds like it starts fine but then does not recognise that the engine is running and switches off the fuel. If this were a non-turbo car, running with a MAP sensor, I’d be looking at that and at the crank sensor… but you don’t have a MAP sensor and the crank sensor is working as the Rev counter moves.

You have a MAF instead of the MAP. Is that all connected up right and can you check the resistances at the pins there? The Haynes manual has the resistance values for all of the sensors and the MAP will have a big resistance range as it is adjustable.

If possible, can you get the blink code reader set up to check the fuel/ignition computer. It’s located on the suspension turret, in the engine bay.

Sorry to not be more helpful but I think MAF and the basic built-in diagnostics are a good start.

To those with a turbo car, I take it that it won’t run with the MAF disconnected, just like a N/A car won’t run with the MAP disconnected?
1987 Volvo 480 ES, 507274, 217 - Red (Ness)
2006 Citroen C6 Exclusive 3.0 petrol/LPG
2008 Mini Cooper convertible (Mau)

Previous 480's:
J123 CFU -- ES
J449 MNL -- ES auto
D864 CPV -- ES
L691 JFC -- Turbo
F70 MNR -- ES
H858 FGV -- Turbo auto
E981 KHM -- ES (509849)

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Baxter
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Re: Volvo 480 turbo '95 no start

Post by Baxter » Thu Dec 23, 2021 11:07 pm

Thanks a lot for your help.

the blink code reader on my car has only 3 (ABS) 5 and 7, but I don't know what is 5 and 7. I have to investigate, the document I have assign 7 to airbag and I don't have airbag :bla: And the code came only once.

Adding more fuel to the admision runs the engine for a couple of seconds. This makes me think it can be the fuel pump.

https://youtu.be/aKd82uCOPnw

I discovered the relays under the dashboard. Which one is for the fuel pump? I'm going to bridge for checking the pump, when I turn the key, I don't hear any noise coming from the pump.

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Baxter
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Re: Volvo 480 turbo '95 no start

Post by Baxter » Thu Dec 23, 2021 11:10 pm

Thanks a lot for your help.

the blink code reader on my car has only 3 (ABS) 5 and 7, but I don't know what is 5 and 7. I have to investigate, the document I have assign 7 to airbag and I don't have airbag :bla: And the code came only once.

Adding more fuel to the admision runs the engine for a couple of seconds. This makes me think it can be the fuel pump.

https://youtu.be/aKd82uCOPnw

I discovered the relays under the dashboard. The white socket is the fuel pump. I'm going to bridge for checking the pump like Haynes explain conecting 87 and 30.
When I turn the key, I don't hear any noise coming from the pump.

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jamescarruthers
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Re: Volvo 480 turbo '95 no start

Post by jamescarruthers » Thu Dec 23, 2021 11:31 pm

Is it this document you are referring to? http://volvo480.myds.me/v480eu/download ... _codes.doc
1987 Volvo 480 ES, 507274, 217 - Red (Ness)
2006 Citroen C6 Exclusive 3.0 petrol/LPG
2008 Mini Cooper convertible (Mau)

Previous 480's:
J123 CFU -- ES
J449 MNL -- ES auto
D864 CPV -- ES
L691 JFC -- Turbo
F70 MNR -- ES
H858 FGV -- Turbo auto
E981 KHM -- ES (509849)

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Baxter
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Re: Volvo 480 turbo '95 no start

Post by Baxter » Fri Dec 24, 2021 12:04 am

Fuel pump checked with bridge on 87 and 30. The pump runs but doesn't start with the pump running.

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Baxter
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Re: Volvo 480 turbo '95 no start

Post by Baxter » Fri Dec 24, 2021 12:09 am

jamescarruthers wrote:
Thu Dec 23, 2021 11:31 pm
Is it this document you are referring to? http://volvo480.myds.me/v480eu/download ... _codes.doc
thanks, but it doesn't work to me that link.

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Re: Volvo 480 turbo '95 no start

Post by jifflemon » Fri Dec 24, 2021 4:11 pm

Jay-Kay-Em wrote:
Thu Dec 23, 2021 12:53 pm
The way that’s cranking and running at the same time, double check your firing order after the lead/cap swap. Keep in mind, flywheel end is number 1.
Have you checked and confirmed this?

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Baxter
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Re: Volvo 480 turbo '95 no start

Post by Baxter » Sat Dec 25, 2021 7:57 pm

jifflemon wrote:
Fri Dec 24, 2021 4:11 pm
Jay-Kay-Em wrote:
Thu Dec 23, 2021 12:53 pm
The way that’s cranking and running at the same time, double check your firing order after the lead/cap swap. Keep in mind, flywheel end is number 1.
Have you checked and confirmed this?

I have checked three times and it is ok. 1342 order firing. the distributor rotates anticlock wise.

I've Unplugged and checked the distributor cap another time.

Adding spray starter to the inlet manifold after the intercooler hose while craking and it has run a few seconds. this makes me think maybe is a lack of petrol or relays or fuel pressure regulator. something new to me, I'm afraid.

In the past in good running order (better than now) it took always a bit of cranking for starting, around 3 or 4 seconds. Maybe it is related to what is happening now and I don't think is normal in a modern car with electronic fuel inyection that delay on starting.

interchanging system relay and fuel pump relay (white socket) doesn't make any difference. I will buy new relays for discarding that.

And then, I will check the fuel pressure regulator, maybe it is stucked, but first I have to understand how it works reading about it.

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dragonflyjewels
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Re: Volvo 480 turbo '95 no start

Post by dragonflyjewels » Sun Dec 26, 2021 9:14 am

We have two turbos and both crank for 3-4 seconds before firing, so I don't think this is abnormal.
Sylvia

Snazzy - 1993 Paris Blue ES red dipstick 2.0i bought 2001
Lethal Lily - 1991 White Turbo
hubby has
Sven - 1994 Racing Green GT
Evil Eva - 1992 Paris Blue Turbo

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Jay-Kay-Em
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Re: Volvo 480 turbo '95 no start

Post by Jay-Kay-Em » Mon Dec 27, 2021 11:18 am

Yep, my Turbo cranks that long and every single YouTube video I have watched of a Turbo does just the same.

You could argue the Turbo does have a MAP sensor - being integral to the EZ210K via the vacuum line connection.

Fuel / Ignition / Air & compression. Work your way through those methodically.

My experience of Bosch Jetronic fuel pressure regulators is they fail in the maximum pressure position. When operating correctly, high vacuum at idle makes them bleed more down the return line. Petrol destroys the internal diaphragm and they become permanently closed, meaning excessive fuel pressure at idle. Not many people would know that it had actually failed. Remember that pressure regulation is a post-rail process and not a pre-rail process.

There is no point speculating what your fuel pressure may or may not be when a full blown fuel pressure test kit, gauges and adapters are £16 from eBay.

I'm away for Chrstmas at the moment, but i'm fairly sure a Haynes manual has all the specifications you need. In fact, the process of disconnecting the rail feed line and doing a pump flow rate test into a beaker is fairly universal across all Jetronic equipped cars.

These new spark plugs you have installed.... what are they trying to tell you? Are they still clean? Do any exhibit combustion deposits? Do they stink of fuel?

Also check for induction leaks post- air flow meter. If the engine is drawing in air that the MAF isn't registering, then you'll have problems. I know the "elephants trunk" inlet hose can split adjacent to the turbine inlet side.

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Re: Volvo 480 turbo '95 no start

Post by Baxter » Mon Dec 27, 2021 9:09 pm

Thanks for your answers, I was making a check before reading those.

The spark plug had better moments in the past, I'm afraid. I would say it is very rich mixture, but of course I've added petrol directly to the inlet manifold.

Image

I've checked if the petrol arrives to the rail. The fuel pump looks very noisy. The fuel goes out of the rail but maybe with not enough pressure.
I will buy that kit for checking fuel pressure. And maybe the regulator and the pump. I think it is too much noisy. Maybe is ending and is a good idea to have a good fuel pump.

I unscrew a bit the nut on the rail and the fuel goes out easily. But It doesn't mean there is enough pressure. I know is not that simple like a carburator. :?

https://www.youtube.com/watch?v=mrZdA5PysU8

https://www.youtube.com/watch?v=uzwWlITOxiM

trying to start the engine with the fuel pump relay unplugged makes a very different noise. very flat, no signal of trying to start.

https://www.youtube.com/watch?v=PoCTZw251Xo

with the relay plugged it tries to start at the beginning. Every time I try to start, the first try is the best.

https://www.youtube.com/watch?v=s-Xg2Q1OThU

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