924Board.org

[Mike77]

My hot start problem, which didn't seem too bad during cooler weather has gotten worse in the 90 degree temps. I'm not convinced mine is one of the typical hot start problems. My injectors are new, I wired up the push button described in the tech section, made sure my injector lines are not touching the engine (they were before) but on a hot day it won't restart even after 5 minutes of shut down. I really don't think it's my check valve or accumulator because to get the engine to restart, all I have to do is disconnect the boot that goes to the throttle body, crank the engine a few times (it will then try to start), reconnect the boot, and it fires right up and runs fine. Is it possibly clearing some vapors when I disconnect the boot? It seems to me that if the accumulator or check valve are bad, the boot disconnect wouldn't fix things. I'm really ready to FINALLY start driving this car, but that boot disconnect trick is gonna grow old real fast, especially with my wife if she ever drives it.

[Richard]

Consider this: when you disconnect the boot you are drawing air into the engine without moving the air sensor plate which is upstream of the boot. If the plate doesn't move, no gas will go to the injectors, and you are in esscence (as you suspected), clearing out the vapor from a flooded engine. I think you have an accumulator check valve or leaky injector, even if they are new. The fuel should stop totally when the engine is shut off. Probably happens when it is cold too, but the engine can use that extra richness then and can't when it's hot.

[Mike77]

Of those of you who have had the hot start problem, how many have found the accumulator or fuel pump to be the problem? Is that common?

[steve]

i have replace everything in my fuel system beside the fuel distributor and i still have the hot start problem. i'm starting to think that i'm loosing pressure somewhere in my fuel lines. i don't know for sure though

[Diesel]

Hey Mike! It would help if you had the gauges hooked up to the fuel system, I don't suppose you'd like to drive to Connecticut to let me look at it?!?

[Diesel]

Have you pulled out the cold-start valve to see if it's leaking after shut-off?

[JvGinPDX]

I would also suspect the cold start valve. Might be leaking all the time, you would have hot start problems when it is warm. Just take it off from the housing when the car is warm and there is pressue in the system.

I have run into a check valve on the fuel pump not holding pressure. Follow Haynes for the proceedure.

[Mike77]

I don't think the cold start is leaking, but I've never checked it AFTER the car is warmed up. Unfortunately I don't have the guages, but I guess I'm gonna have to buy some because this problem has me totally fed up with this car,which is unfortunate since the rest of the car is so nice, and it runs well (till I have to restart). I just picked up a 1964 Volvo P1800s from my friend's Dad and those good old SU carbs are a welcome site after dealing with the CIS problems on the 924.

[Smoothie]

The accumulator is real easy to check. Might as well do it just to rule it out - Remove the little screw thats at the bottom of the accumulator. If fuel comes out, it's bad.