Problem Starting crossflow when hot engine

16 posts / 0 new
Last post
Barry Thompson
Barry Thompson's picture
Offline
Last seen: 5 days 19 hours ago
Joined: 17/04/2014
Problem Starting crossflow when hot engine

Starts ok when cold but after run in hot weather the 1990 super sprint refuses to restart after stopping for a minute or two.  Pushing is the same , however leave for 10 minutes and starts. As if petrol not getting through , but once going drives fine.    Any ideas please ?    Son been using car as essential worker. I have had car for years and always been ok.  

SM25T
SM25T's picture
Offline
Last seen: 4 hours 19 min ago
Joined: 17/04/2014
Fuel vapourising above hot engine parts ?
Ian Macquarie
Offline
Last seen: 1 hour 6 min ago
Joined: 17/04/2014

I see you suspect a petrol problem - but have you managed to test for a spark when it will not start?
 

Gun Bunny
Gun Bunny's picture
Offline
Last seen: 16 hours 14 min ago
Joined: 17/04/2014

Barry

Had a similar problem years ago on my XFlow, it would not re start after refuelling or other short stops & it was the carbon brush inside the distributor cap had almost worn away.

Olly

Olgawld
Offline
Last seen: 3 weeks 1 day ago
Joined: 24/12/2018
I was going to suggest dizzy cap as above says. Check rotor arm and general cleanliness and condition as well as leads.
Englishmaninwales
Englishmaninwales's picture
Offline
Last seen: 5 hours 12 min ago
Joined: 17/04/2014

Two things to consider - try replacing the HT coil, if it is old it may fail when hot. Make sure you get one with the correct voltage rating (there may be a ballast resistor) otherwise it will kill an electronic ignition unit (guess how I know!)

Hot starting can be improved with a wide open throttle. The pedal must be depressed to WOT slowly so not to activate the Weber acc pump jets and flood the engine.

Malcolm

john g
Offline
Last seen: 12 hours 42 min ago
Joined: 17/04/2014

We've all had different experiences.......when was the last time you changed the plugs? My xflow started ok, ran ok for 20 minutes then I struggled to drive it. Left it for 20 minutes and it was fine. ''Twas the plugs.

Barry Thompson
Barry Thompson's picture
Offline
Last seen: 5 days 19 hours ago
Joined: 17/04/2014

Many thanks for all your help. Will work through as suggested.  

HendrixsWhiteSt...
HendrixsWhiteStratReturns's picture
Offline
Last seen: 19 hours 10 min ago
Joined: 14/04/2016

Hi Barry

I have  a 1990 Superprint and had same issue , drove me bloody mad.. traced to carbs and also the igniter in the dizzie was faulty.

Assuming that's all checked and plugs/HTs and coil okay then could also be:

- crud in the fuel tank

-Blocked inline filter ?

One other thing to check - vapour lock in fuel tank. Next time it happens open filler cap and if you hear a whooosh of air inrush that could be the problem, solution is a small hole drilled through the cap itself

 

 

'scuse me while I kiss the sky

SM25T
SM25T's picture
Offline
Last seen: 4 hours 19 min ago
Joined: 17/04/2014
I think vapour lock is when fuel heats in a hose (ie over hot engine) and the resultant bubble of vapour won't let fuel past. What you are describing is effectively a vacuum in the tank, and the pump can't pull the fuel forwards without a breather to let air in.
HendrixsWhiteSt...
HendrixsWhiteStratReturns's picture
Offline
Last seen: 19 hours 10 min ago
Joined: 14/04/2016

Reply to #10

Sorry, wrong choice of words, yes a vacuum in the tank is what I meant. A few people suggested it when I was having similar issues with my '90 Supersprint. Turned out not to be the issue but it (the filler cap) was drilled anyway ...partly to rule it out and partly to stop any issues in the future.

Barry - any luck with finding the problem ?

'scuse me while I kiss the sky