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Hi,

As many of you know, I drive a 1984 Volvo 240GL (Auto) ...fitted with a B200E engine and a Pierburg 175 Cd carburetor. My car is close to perfect condition. However, there is one problem I have been facing ever since I got my car.

Everytime I start my car in the morning, it starts/ignites immediately. But after less than a second, it dies off. This happens no matter how many times I start the car. It just does not want to idle. Dies off everytime I start it. The only way to get it to idle and not die off is to pump the accelerator a couple of times after starting it. This helps to get the engine to idle. But the idling is very weak. It does not die off, but it feels like it would die, because the idling is so weak. The engine also vibrates violently while this is happening.

But after 7 minutes or so, when the engine warms up, the idling gets stronger and the engine vibration smoothens out a bit. Once the engine is hot, everything is perfect. Compression is good, tuning is also OK. No problems at all when the engine is hot.

This problem does not only happen in the morning. If I leave the car overnight without starting in the morning, but decide to start it in the afternoon when the weather is hot. I get the same problem. But once I get to work and its time to go home (9 hours later) and I try starting the car in the evening, it starts and idles (but the idling is weak). The engine only fails to idle when I start the car for the first time of the day. Does not make any dufference whether it's in the morning or afternoon. The first start of the day is what gives me problems.

I have tried everything. I recently serviced the carburetor (changed some carb parts too). Tuned it and tuned everything else. But still the same thing. Everything stablises only when the engine is hot.

A few months ago, I got my car tuned during servicing. The morning cold start problem was solved. The idling was good. But I had to retune the car because the tuning was not right. I found that my fuel consumption was a bit high. But after re-tuning, the cold start problem came back, but everything else was perfect.

Has anyone encountered this problem before? Any idea what the problem might be? I have taken my car to so may Volvo specialists (all of them were former FA mechanics), but none of them could solve this problem. They can tune my car to perfection, but the cold start problem still persists. Need help!!

Regards.

Mark David
 

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whether injection or carby there must be a "choke" mechanism to greatly richen the mixture when cold, and generally the "throttle" also will be advanced a bit at same time

with carbies there will be a mechanism on the carby or simply a manual choke pull

you will need to adjust/replace whatever mechanism it is, or if it is manual, "learn" how much to pull for different seasons

the symtoms simply say "it" is not working at all, exactly same for manual choke if you forgot to pull it out before start engine
 

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yeah i have the same EXACT problem but my car is a fuel injection engine.. what do i do? replace fuel pump....(already cleaned out throttle body)....what else.. i hear hissing noise (sounds like turbo) coming from my engine when i accelerate....idk what that is...vacuum leak??? if so where are the vacuum lines at? thanks
 

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well not sure if 1984 still mechanical system but if it is the choking is by the Warm Up Regulator - that little die cast box with wires, vacuum hoses and fuel lines

it has a bi metal strip and heater so when you start it is in full bleed off so low control pressure to TOP of fuel dist so you get rich mixture so volvo happy

then heater increases pressure up to 55psi when fully warmed up

if the tiny strainer is blocked it will always give 70 psi so no choke
 
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