Sluggish Starting after a run

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TasMan
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Joined: 04 Jun 2019 06:09 pm
Location: Ayr, SW Scotland

Sluggish Starting after a run

Post by TasMan » 24 Mar 2020 10:53 pm

Hi All,
Still getting used to my 360, not really had a decent run out in it as yet (and unlikely for another while now.....)
Anyway, the previous owner reported it would sometimes need a fair bit of cranking after it had been out a run.
On Sunday I had it out for a short run and while it started cold no problem and was running well, after parking up and trying to restart it took a bit of cranking and pumping the throttle to get it going. Noticed a bit of a petrol smell once it had started up which soon cleared and there were no leaks evident.
This is the B200E engine with Jetronic. The cold start injector had been disconnected before I got the car and still is.
Any thoughts as to what to look at first - possible over fueling ? Leaky injectors / cold start injector ?
Its had full new plugs, leads, rotor and cap and new crank sensor.
Hopefully someone has had similar experience that can provide a few clues where to start ?
Many thanks Dave
1987 360 GLT

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bogbasic
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Re: Sluggish Starting after a run

Post by bogbasic » 01 Apr 2020 03:42 am

If the cold-start injector had jammed open, the mixture may be too rich to start from hot ;-?

Not an injection person, sorry!
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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TasMan
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Re: Sluggish Starting after a run

Post by TasMan » 05 Apr 2020 04:52 pm

Yeah, no worries, I am thinking it is along the lines of the injectors.
When the restrictions are lifted it will be getting a dose of injector treatment to see if that improves things.
I might reconnect the cold start injector and see what that does.
Read somewhere about the thermo switch being faulty but not read up on it.
Will update if I find anything more.
1987 360 GLT

Logan360
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Re: Sluggish Starting after a run

Post by Logan360 » 07 Apr 2020 10:41 pm

Yea reconnect the csi and see if that helps anything. I know with the later 5 pot whiteblocks a failed temp sensor can cause a massive amount of fueling and starting issues.
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Ride_on
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Re: Sluggish Starting after a run

Post by Ride_on » 08 Apr 2020 02:54 am

It is likely you have a problem with the FPR (fuel pressure regulator). This should maintain pressure in the rail after shut off for about 30mins. If its not working and the pressure drops you will get vapour in the rail from the hot engine pushing the fuel back into the tank.

If you can check the fuel pressure rather than dive straight for a new (hard to find) FPR you won't waste your time and money.

Its also not unusual for the cold start injector to be leaky (unplugging is unlikely to help), but I tend to think rich mixtures have to be very rich to prevent startup. Maybe there is alot of vapour in the manifold.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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TasMan
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Re: Sluggish Starting after a run

Post by TasMan » 08 Apr 2020 06:28 pm

Thanks for the replies, very helpful.
Hadn't occurred to me about the fuel pressure but this seems very plausible and exactly as described i.e when hot it takes a bit of cranking which suggest clearing of vapour and the system pressure restoring.
I have had a look through the manual scans from here, and there is some good stuff in here on checking fuel pressure.
I need to get hold of testing gear, probably worthwhile buying a set, they seem fairly inexpensive on Ebay.
I wonder how many dealers had all the correct 'special tools' on the shelf back in the day...?
I see Skandix have regulators for about 90 Euro, seems a pricey item.
Will report back when I get round to further checks.
Thanks!
1987 360 GLT

Ride_on
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Re: Sluggish Starting after a run

Post by Ride_on » 18 Apr 2020 11:10 am

A quick check is to pull the vaccum pipe off and check for fuel on the outside of the system, by smell or drips. Other checks are to open the fuel supply side and check for pressure (carefully) after say 5 mins.

Think I saw an 360 FPR on ebay the other day.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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TasMan
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Re: Sluggish Starting after a run

Post by TasMan » 26 Apr 2020 12:52 pm

Just an update, I bought a new regulator off Ebay (28 quid aftermarket seemed fine) as I figured it would be worth changing it anyway.
The car sat for years unused and it probably doesn't do components like that any good.
I don't have test gear and a kit is around the same price so I figured I would take the chance on the regulator first.
Had the car fired up today, got it warmed up and then pulled the vacuum line off the regulator. There was a small initial spurt/mist of fuel from the connection nipple along with the engine running like a 3 legged dog....
With the engine off the pipe smelled of petrol so I reckon the regulator is past its best.
I will get it changed in the near future and report back.
I am thinking this may also be contributing to the occasional kangaroo performance when driving around on light throttle, time will tell. Thanks for the tips so far...
1987 360 GLT

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TasMan
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Re: Sluggish Starting after a run

Post by TasMan » 04 Jun 2020 10:57 pm

Just an update to this thread.
Finally got the regulator changed today.
The old one was well and truly knackered. The car had lain for a couple of weeks and fuel poured out the vacuum connection... Blowing through also gave a hissing in the fuel ports.
100% improvement to the running and starting with the new regulator.....many thanks for pointing that out.
The hesitation and spluttering at certain RPMs has gone, I assume the engine was getting excess fuel direct into the manifold via the vacuum line due to this issue. It also probably explains the previous owner having problems getting the CO emissions down for MOT if the regulator has been chucking in extra fuel after the mixture adjustment.... :wink:

Anyway, a brief run tonight has given a good result, much sweeter to drive......however I now seem to have a binding rear brake drum (drivers side) so that will need unexpected attention..... :roll:
1987 360 GLT

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SteveP
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Re: Sluggish Starting after a run

Post by SteveP » 05 Jun 2020 02:10 pm

That's a good result! The handbrake cables can be a bit of a pain to seperate from the shoes, so I'd recommend some handheld handbrake cable spring compressors, it makes the job doable in seconds rather than a lot of swearing :lol:
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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TasMan
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Re: Sluggish Starting after a run

Post by TasMan » 05 Jun 2020 03:57 pm

Appreciate the tip Steve....this is a steep learning curve for me, not dealt with brakes before but then again I hadn't done a timing belt or pressure regulator before either.... :lol:

Is it one of these you refer to ?
https://www.amazon.co.uk/eje-herramient ... 0D46XQJJ47

I noticed this morning the brake had freed off with cooling down, so I am hoping a clean/grease/adjustment will be all that's needed but will only know when I get the drum off. I expect the brake fluid will also need changed and probably worth doing all the hoses.

I'm getting a full new set of tyres tomorrow so was hoping to take it a long run but the brakes have put the brakes on that so to speak.... :?
1987 360 GLT

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SteveP
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Re: Sluggish Starting after a run

Post by SteveP » 05 Jun 2020 04:11 pm

Yes they look similar/the same as mine - it's quite an investment for the number of times you'll likely use it, but I found it very difficult trying without and this just made it a piece of cake. Saying that, you might not have to totally disassemble your rear brakes - could be a sticky wheel cylinder or the drum clogged with brake dust/dirt/debris.

It's all a learning game, I didn't know how to do a headgasket or remove a gearbox until my GLS necessitated it, but you don't know til you try :lol:
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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TasMan
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Re: Sluggish Starting after a run

Post by TasMan » 05 Jun 2020 05:50 pm

Cheers for that, will check out the state of play when I get the drum off...
Its not surprising there could be an issue given the amount of time it has sat in various garages over the years, the old boy who had it before me only did about 700 miles in 3 years and I have barely had the chance to drive it... Getting there slowly with the various jobs, seem to do a job and another gets added to the list :lol:
1987 360 GLT

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