[480T] Warm engine don't want to work or struggle

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bigdickbuster
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[480T] Warm engine don't want to work or struggle

Post by bigdickbuster » Tue Oct 19, 2010 4:37 pm

Like described in the subject. When the engine is cold, everything is fine. Have good start on the petrol and LPG. When the temperature goes up, (about 80*C -176*F degree) engine started struggling. Pandemonium appeared around 90*C - 194*F. Radiator fan comes to the action. Engine doesn't work in this moment on the petrol, and have poor idle on the LPG. When you somehow manage to started engine on the petrol, idle is more than poor, engine doesn't response to the gas pedal pushing. Revs are about 300-600RPM. You can hear explosion inside of engine. As I said on the foreword, engine works well when it's cold and have big problem when reaches normal temperature.
:help: :nuts:
Last edited by bigdickbuster on Wed Oct 20, 2010 12:00 pm, edited 1 time in total.
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Re: [480T] Warm engine don't want to work or struggle when hot

Post by Iroll480 » Wed Oct 20, 2010 10:47 am

I suspect a fault in the ignition. How's the state of distr.cap, leads, rotor and sparkplugs? Any oil leakage underneat the distr.cap? Does the coil gets hot to the touch when the problems occur?

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bigdickbuster
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Re: [480T] Warm engine don't want to work or struggle

Post by bigdickbuster » Wed Oct 20, 2010 2:27 pm

I replaced ignition wires. Sparkplugs are OK. They have brown-grey colour. I cleaned contacts inside of the distributor cap. Rotor is OK.

Usually, when the problem lies in the ignition system, engine work on the petrol, and will not work on the LPG. LPG is more sensitive for the ignition system failures. In my case the situation is reversed.
1986 480 ES, model year '87, 217 Red - Reliable mate
ex 1990 480 TURBO, model year '90, 231 Red Image This car was a mistake :D

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Re: [480T] Warm engine don't want to work or struggle

Post by Derek » Wed Oct 20, 2010 6:55 pm

you say it's worse when the cooling fan comes on and you say in another post the some thing is draining the battery. I would start checking the alternator as it sounds like it cant keep up with the power demand and the ECU's aren't getting enough power to keep them running right. the alternator could also be draining the battery as when the diode pack fails the power from the battery goes back the alternator and tries to make it turn when it gets really bad it can catch on fire. happened on a friends rover 25

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Re: [480T] Warm engine don't want to work or struggle

Post by Iroll480 » Thu Oct 21, 2010 8:04 am

You can hear explosion inside of engine.
I read this as it misfires, that's why I thought of a bad ignition coil. When those are going bad they first start giving problems when getting hot.
I think it's worthwhile checking just to eliminate.

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Re: [480T] Warm engine don't want to work or struggle

Post by bigdickbuster » Wed Oct 27, 2010 3:55 pm

Thanks folks for the replies.

I noticed, that engine is very hot after riding. Intake manifold is hot. It's strange, because IC shows usual about 176-194*F. Auxillary water pump (from the turbine) works about 40 minutes after turning off the engine. Hmmm...
1986 480 ES, model year '87, 217 Red - Reliable mate
ex 1990 480 TURBO, model year '90, 231 Red Image This car was a mistake :D

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glasgowjim
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Re: [480T] Warm engine don't want to work or struggle

Post by glasgowjim » Wed Oct 27, 2010 4:28 pm

Thermostat ? :D

Blocked radiator ?

Leaking heater matrix?

duff engine temp sensor?

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Re: [480T] Warm engine don't want to work or struggle

Post by bigdickbuster » Wed Oct 27, 2010 8:40 pm

There was no leakage: D

Is it possible situation, that the ECU comes in safe mode because the high temperature is too risky to the engine?

I noticed another strange case: In my ES coolant flows around the engine. I can see it in the coolant tank :wink:

In the Turbo, coolant stand in the tank. No movement. This is abnormal, i think?
1986 480 ES, model year '87, 217 Red - Reliable mate
ex 1990 480 TURBO, model year '90, 231 Red Image This car was a mistake :D

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Re: [480T] Warm engine don't want to work or struggle

Post by Iroll480 » Thu Oct 28, 2010 6:59 am

Is it possible situation, that the ECU comes in safe mode because the high temperature is too risky to the engine?
The ecu won't do that, the only thing you get is the warning STOP on the display if the engine overheats.
I noticed another strange case: In my ES coolant flows around the engine. I can see it in the coolant tank
Could be a blown headgasket. Check for water in the oil and/or oil in the water.

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Re: [480T] Warm engine don't want to work or struggle

Post by bigdickbuster » Thu Oct 28, 2010 4:21 pm

I wasn't too precise :wink: my fault.

In ES everything is allright. Coolant water is circulating in the engine. I can see it in the coolant tank. Water comes back from the engine to the tank with using thin pipe, and goes to the radiator with using thick pipe. Just like on the photo.

Image

In Turbo everything stands in the coolant tank. There is no move of the water. It looks like the water pump didn''t work. Is it possible?

There is no oil in the water in the tank.
1986 480 ES, model year '87, 217 Red - Reliable mate
ex 1990 480 TURBO, model year '90, 231 Red Image This car was a mistake :D

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