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Hard Start Coolish Mornings

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

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conotech
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Hard Start Coolish Mornings

Post by conotech » Fri Aug 24, 2018 2:45 pm

Last spring a problem suddenly developed on my 89 Volvo 245 (B230F).

The first start of the day on cool dry mornings is uneventful.

As the car warms up (temperature gauge needle moves into normal mid-range), if I turn off the car engine, then attempt to restart, the engine is difficult to start. If I nurse the accelerator pedal, I can get the engine to start but it misses a lot and seems barely to run. Within a minute of this, it resumes normal operation.

A similar scenario occurs after the initial start when coming to a stop (stopping at an intersection for instance). When I attempt to accelerate, the engine stumbles and sometimes simply quits.

In all cases, all subsequent starts are normal until the engine completely cools again.

During the warm part of the summer, this problem stopped happening. Now that the weather is cooling off (low 60's), the problem has resumed.

The problem is reliably consistent on cool mornings, dry or wet. No engine service lights are displayed.

Any ideas what might be causing this?

Thank you

93Regina
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Re: Hard Start Coolish Mornings

Post by 93Regina » Fri Aug 24, 2018 8:37 pm


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RickHaleParker
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Re: Hard Start Coolish Mornings

Post by RickHaleParker » Fri Aug 24, 2018 9:34 pm

Try this: Turn key on, wait 5 seconds, then start.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

conotech
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conotech

Re: Hard Start Coolish Mornings

Post by conotech » Fri Aug 24, 2018 11:12 pm

93Regina and RickHaleParker: I'll follow up accordingly over the next few days. Thank you.

93Regina
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Re: Hard Start Coolish Mornings

Post by 93Regina » Sat Aug 25, 2018 3:55 am

RickHaleParker wrote:
Fri Aug 24, 2018 9:34 pm
Turn key on, wait 5 seconds, then start.
How about, listen for fuel pump to engage?

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