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1986 Volvo 244 DL, Everything is dying.

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

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Smorgeeborg
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Smorgeeborg

1986 Volvo 244 DL, Everything is dying.

Post by Smorgeeborg » Sat Dec 07, 2019 5:36 pm

Good evening all! First post.

I am the second owner of a 1986 Volvo 244 DL. Yesterday, after several days of driving it around in the snow, a lot of things went wrong at once.

To begin, in the morning I was suffering from a bizarre problem, where the engine would cut out above certain speeds, and would kick back on as soon as it went back down, e.g. in fourth, it'd get to 33, cut out, slow down to 32, kick on, get to 33, cut out, etc. When cold is worked fine, and today it wasn't an issue at all.

Later in the day, I parked, and when I got back to the car, it wouldn't turn out. The only sound on turning the ignition was the click of the headlight relay turning off. After a lot of confusion and calling over a friend, we found that if we jumped the starter motor by poking around under the intake, it'd start right up, but wouldn't work with the key.

On driving home, I noticed that the dashboard engine temp gauge, which was working fine in the morning, had stopped working and was telling me the engine was dead cold. When I got home, I got out and smelled the exhaust, which was running way rich, showing the LH2.2 engine temp gauge was also busted.

Bright side is, I have a backup car. Downside is, I'm pretty sure the biodegradeable wiring harness is finally kicking the bucket, but I have no way to check. What do?

Edit: I've ordered a wiring harness, it seems that's the only part that makes sense given the reputation of this generation.

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volvolugnut
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volvolugnut

Re: 1986 Volvo 244 DL, Everything is dying.

Post by volvolugnut » Sun Dec 08, 2019 4:33 pm

Do you have a splash pan installed? Without the splash pan, lower engine wiring will get wet and short. Things like starter wiring are down low. Also, there is a bundle of wires going under the front of the engine that may be shorted by water.
Look for wire insulation failure at the exposed ends where wires come out of plastic harness. Places I saw crumbling was at headlights, and at the connections at the firewall.
Replacing the entire engine harness is a not so much hard as it is fiddly and dirty process. Tag connections with wire color or take photos before disconnecting anything. You will not remember all of the connections when you put it back together. Compare to the replacement harness as you go. Considering the age of your car, someone may have made repairs to your wiring in color other than your new harness.
volvolugnut
2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

Smorgeeborg
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Smorgeeborg

Re: 1986 Volvo 244 DL, Everything is dying.

Post by Smorgeeborg » Sun Dec 08, 2019 4:54 pm

No splash pan, that's on my list of things to install. It was a California car until the mid-90's, so the wiring issues are delayed by a few years because it was in a better climate. I have a history of the repairs, and the wiring's not mentioned.

Although I've had to do a few repairs by the firewall with some flex spray, some 4 wire connector above/behind the engine.

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volvolugnut
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Re: 1986 Volvo 244 DL, Everything is dying.

Post by volvolugnut » Sun Dec 08, 2019 5:04 pm

If you can see some crumbling wires, you likely have others you can't see. I hope you found a reasonable priced harness.
IPD has replacement plastic splash pans.
volvolugnut
2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

Smorgeeborg
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Smorgeeborg

Re: 1986 Volvo 244 DL, Everything is dying.

Post by Smorgeeborg » Sun Dec 08, 2019 5:08 pm

Yeah, I've had the IPD splash pan for like 2 months, have kept holding it off. Gonna put it on when I replace the harness.

Ordered a 370 dollar harness from Dave's Volvo Site. Is that a good price for a new harness?

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volvolugnut
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Re: 1986 Volvo 244 DL, Everything is dying.

Post by volvolugnut » Sun Dec 08, 2019 6:00 pm

Cheaper than they used to be for new. A actually bought a used harness from Dave about 2000. Small world.
volvolugnut
2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

Smorgeeborg
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Smorgeeborg

Re: 1986 Volvo 244 DL, Everything is dying.

Post by Smorgeeborg » Sun Dec 08, 2019 6:45 pm

Also, as a side note: I'm looking to get to 120mph on my Volvo. The engine's strong enough to hold 100mph as it is, how far could I get doing underbody aero mods and switching to an electric fan? Would the IPD cam be necessary?

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volvolugnut
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Re: 1986 Volvo 244 DL, Everything is dying.

Post by volvolugnut » Wed Dec 11, 2019 10:37 am

All other things being the same, increasing speed from 100 to 120 MPH would require 44 % more horsepower to push the air. Mechanical drag would also increase. Technically, that is a 'bunch' of power increase.
volvolugnut
2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

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RickHaleParker
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Re: 1986 Volvo 244 DL, Everything is dying.

Post by RickHaleParker » Fri Dec 13, 2019 3:01 am

volvolugnut wrote:
Wed Dec 11, 2019 10:37 am
All other things being the same, increasing speed from 100 to 120 MPH would require 44 % more horsepower to push the air. Mechanical drag would also increase. Technically, that is a 'bunch' of power increase.
volvolugnut
How do you come up with 44% more power? Yes the Kinetic energy will be 44% higher at 120 MPH then it is at 100 MPH but that is energy not power.

A car will top out when the energy loss rate (- Power ) = the maximum power at the drive wheels. In other words, when the drive train can no longer keep up with the energy losses due to drag and friction.

Kinetic energy is the energy of motion.
Power is the rate which energy is transferred or converted.
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volvolugnut
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volvolugnut

Re: 1986 Volvo 244 DL, Everything is dying.

Post by volvolugnut » Fri Dec 13, 2019 8:27 am

I considered air drag only from equation found here: https://www.grc.nasa.gov/www/k-12/airplane/drageq.html
I considered there is no change in frontal area, drag coeffiecent, or air density but increasing speed from 100 to 120 mph. Then the drag increase is square of 120 MPH and 100 MPH. 14,400 divided by 10,000 is 1.44 or 44% increase in drag. Increase in drag must be overcome by increase in horsepower. So the horsepower has to increase 44 percent.

If I missed something here, please correct me.

volvolugnut
2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

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