1984 308 QV Warm start issue, not accumulator

Afternoon Jim,
Have you had a chance to look at manuals? One last thing, is your car K-Jet or K-Jet Lambda?

John

 

Keep this guy in mind

Here is some fun reading too

http://www.cisflowtech.com/technical-articles/

 

I can see you falling into the "replacement part trap" Without proper testing first you are just throwing money away. Go back to some of the previous advise, you should pressure test the system, it will verify fuel pump operation, check valve, accumulator, etc. The specs are in the 308 manual, I think the Mondial version is the most complete. I googled and downloaded the Bosch CIS manual in pdf, which gives great insight into how CIS works and how to test it (inc.pressure tests) Good luck!

 

Afternoon Jim, as far as I know QV never had K-Jet Lambda like the 328. But on the gas tester quote someone mentioned unplugging the O2 sensor. this is only possible if it has an O2 sensor, sounded odd.

 

1984-85 US version 308QV and 1984-85 US version Mondial QV are K-Jet with Lambda.

 

Indeed, I too have gone the replacement part track on occasion, but my feeling is that in cars this age anything could be justifiably replaced or reconditioned. As noted, ends up being a form of preventive maintenance, while helping rule out some quirky problems that can be hard to diagnose.

Do note that some people believe the original pump can last forever, and that the newer pumps are not built to the same quality. Generally, reconditioning parts on these cars is better than replacement where possible. You might have the old steel fuel injectors, while the new replacement ones are made of brass. Don't throw away the old ones, they can be cleaned and tested and are probably ok based on how your car is running.

You might also inspect the fuse box connector which activates the fuel pump. After the car has run the load on the pump can cause the connection to overheat, you may be getting a poor initial pump connection when starting the hot car.

Pressure test will be helpful to rule many things out for sure. Just noting that inspecting (disconnect, clean and reconnect) all relevent electrcial connections, and ruling out some fairly common things eg. a leaky cold start injector, or thermotime switch failing, will address things that may not diagnose with a pressure test.

Most threads relating to poor hot starts sound like the cars barely start or need huge crank time when hot. Yours sounds like a much more mild hot start issue, with the car running well otherwise, so some of the more obvious things like eg. a failing fuel pump would not seem to fit the symptom.