Anyone any experience of a D-Jetronic Fuel Injection
Discussion
Skyedriver said:
Car, Volvo 1800 ES, rough running, ignition seems sound, remove supply pipe to the fuel rail and turn on ignition, there's a 1.5 - 2.0 spurt of fuel then nothing. Relay clicks on and off again. Should it not be a continuous flow of fuel to the fuel rail?
Thanks
Might be a safety thing that only pumps while cranking or running?Thanks
That sounds correct to me. EFI cars run the pump to ensure fuel pressure but it doesn't run indefinitely unless the ECU sees a signal from the crank sensor.
I don't know specifically for your car (and I'm sure there will be an oddity somewhere) but that would be exactly what I expect to see with the key on/rail supply disconnected.
I don't know specifically for your car (and I'm sure there will be an oddity somewhere) but that would be exactly what I expect to see with the key on/rail supply disconnected.
Having spent a while googling (more successfully than getting the car started) yes a 2 second burst to prime the line.
Gauge on the supply hose to the rail reads 60psi, regulator should knock that down to 30psi
I have decent spark at the plugs.
All I can think of is ither the injectors aren't injecting and they were when the car was used two weeks previous or the cylinders have been flooded somehow when starting but that's never happened before. Had the car about 4 or 5 months, done around 800miles.
Thinking out aloud, I haven't checked ignition timing but I haven't moved the distributor, just taken the cap off and checked the breaker points. And that was after it died.
Gauge on the supply hose to the rail reads 60psi, regulator should knock that down to 30psi
I have decent spark at the plugs.
All I can think of is ither the injectors aren't injecting and they were when the car was used two weeks previous or the cylinders have been flooded somehow when starting but that's never happened before. Had the car about 4 or 5 months, done around 800miles.
Thinking out aloud, I haven't checked ignition timing but I haven't moved the distributor, just taken the cap off and checked the breaker points. And that was after it died.
Skyedriver said:
Having spent a while googling (more successfully than getting the car started) yes a 2 second burst to prime the line.
Gauge on the supply hose to the rail reads 60psi, regulator should knock that down to 30psi
I have decent spark at the plugs.
All I can think of is ither the injectors aren't injecting and they were when the car was used two weeks previous or the cylinders have been flooded somehow when starting but that's never happened before. Had the car about 4 or 5 months, done around 800miles.
Thinking out aloud, I haven't checked ignition timing but I haven't moved the distributor, just taken the cap off and checked the breaker points. And that was after it died.
Is it simple to pull the spark plugs?Gauge on the supply hose to the rail reads 60psi, regulator should knock that down to 30psi
I have decent spark at the plugs.
All I can think of is ither the injectors aren't injecting and they were when the car was used two weeks previous or the cylinders have been flooded somehow when starting but that's never happened before. Had the car about 4 or 5 months, done around 800miles.
Thinking out aloud, I haven't checked ignition timing but I haven't moved the distributor, just taken the cap off and checked the breaker points. And that was after it died.
If so, I'd do that, see if they look soaked in petrol. Maybe give the engine a spin over to clear out any excess fuel in there.
Or, if it's a pain to pull the plugs, pull the fuel pump fuse, then crank it for 30 seconds or so to clear any flooding. If the engine starts and runs for a couple of seconds in the middle of that, you'll know it was flooded and it's now been cleared.
Was the anything unusual about the last time it ran? Was it a particularly short (maybe fired up just to shunt it around), or long running? Or just another typical journey?
I'm familiar with the bastardised lucas version of this on the early Jaguar V12.
Good suggestions about flooding, although even cranking on the key it should stink of unburned fuel out the exhaust if it's totally flooded.
Pull an injector and see if it's squirting fuel everywhere if you don't think it's getting fuel.
Good suggestions about flooding, although even cranking on the key it should stink of unburned fuel out the exhaust if it's totally flooded.
Pull an injector and see if it's squirting fuel everywhere if you don't think it's getting fuel.
It's nearly 10 years since I had my 1800es so I'm working off memory now.
If you're suspecting the injection, pull an injector and turn the engine over - you should get pulses of fuel.
However you're saying poor running. If there was an issue with the pump or injection triggering, I'd have expected it not to be running.
The only time I had any rough running turned out to be just points needing replacing.
If you're suspecting the injection, pull an injector and turn the engine over - you should get pulses of fuel.
However you're saying poor running. If there was an issue with the pump or injection triggering, I'd have expected it not to be running.
The only time I had any rough running turned out to be just points needing replacing.
Had various cars with this over the years.
Firstly check fuel pressure both from the pump & then after the FPR. Old cars, sometimes have crap in the fuel (is the fuel fresh? this fouls the pump or even kills it.
If fuel pressure OK check the one way check valve. A timer relay fires the pump on ignition switch on and if the one way valve is duff then the pressure decays & it may not start.
Old trick, can of easy start into the intake. Does it run? Yes then it is fuel. Sometimes I've had cars fire up & stay running after doing this.
Firstly check fuel pressure both from the pump & then after the FPR. Old cars, sometimes have crap in the fuel (is the fuel fresh? this fouls the pump or even kills it.
If fuel pressure OK check the one way check valve. A timer relay fires the pump on ignition switch on and if the one way valve is duff then the pressure decays & it may not start.
Old trick, can of easy start into the intake. Does it run? Yes then it is fuel. Sometimes I've had cars fire up & stay running after doing this.
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