Fuel Injection System tinkering on the Volvo 240 

Here's some of my experiences with '91/245/Wagon and '88/240/Sedan. The sedan would just die mid flight in very hot summer weather as if you shut of the ignition key. With a 5 to 10 minute wait it would start and run again perfectly fine. Again, it would die after a short while and a rest time would bring it back to life to get home. I swapped main fuel pump from my donor car but it didn't help. As fall/winter set in the problem just vanished, ran until next summer and problem came back again. I found it was in-tank fuel pump failed causing the main pump to overheat and shut down. Cool off time brought it back... In-tank pump solved it. The Wagon developed a crank/no start condition but a squirt of quickstart ether into a vacuum port would start it and it would run! That turned out to be the crank pos. sensor on top of the bell housing/flywheel. I presume no signal stops the fuel pump relay.. but somehow if you'd start with ether spray it would run !! .. New sensor and all fine again.

I'm a little disappointed. I hardly heard any DONGDING DONG DONG's in this video. What's the deal with that? Just kidding, fantastic job on this fix. Do you have any updates on the engine for the wagon yet?

Doesn't the LH2.2 have long term learning algorithms anyway? When she didn't start at first, maybe disconnecting the battery to delete the storage could have sped it up a little.

Well, it keeps you off the street, this hobby 😅

Turbo engine injectors have bigger flow rate and low impedance values as you mentioned. You will blow ecu if you put the turbo injectors to the NA engine. Actually you will blow the turbo engine ecu too if the resistor pack is bypassed. There is more stuff to know from the injectors when it comes to the replacing them with the similiar ones. Things like dead time, dynamic flow rate etc etc.

Pick and mix, nice job....Stones song to celebrate ."if you start it...up it will never stop"...you make an Old Volvo run.....where is the Mercedes thing at ?

Thank you for providing this content for us, im in the army now and these videos help me with separation anxiety from my 740..😂 Greetings from Finland👍

if you dont find the headlamps being good enough you may got old reflectors, and if you got new good reflectors may i suggest new bulbs, i personally run some OSRAM nightbreaker laser+ and even up here in scandinavia i feel they are perfectly adequate in the dark winter without extra lights :)

Glad you found the problem and got the cars running again! Silicone grease certainly is great to have around. Seals slide in much easier, and you don't ruin them over time. Have come across too many times where seals swell up because someone have used petroleum based grease instead of silicone. My '86 740, after being reliable and starting every day for a decade, suddenly refused a couple of weeks ago. After some troubleshooting I found one of the coils in the fuel pump relay had an open circuit. No cracked solder joints or other visible damage. Was like 50 euro or so for a new one at the dealer. The guy there said they last about 10 years, and mine had a date code from 2011. Fired right up after installing the new relay.

Nice. Doing the ballast resistor mod and throwing some white 766 high imp injectors in my '89 780 LH2.2 car right now

If you don’t bend a 240 fuel rail at some point, you’re not maintaining your car enough

Don't you just love a red block

Nice one!

Good work 👍

Nice job. She’s sounding good!

Well done dude, shes a runner! I sold my 240 today unfortunately, the rot was just to bad and the quotes to get it fixed were way out of my budget. On the plus side i did get a low mileage 97 940 2.3t estate to replace it! All the best mate, 🤘

Excellent work, I managed to destroy the fuel ECU on my 242GT Group A replica with some aftermarket injectors, learnt my lesson the hard and expensive way!!

It runs good. Nice job. In fact it runs so good judging by the look of that sparkplug that i suggest not even bothering for that 2.5bar FPR. Just leave that 3bar FPR in there.

Luckily (for me) the only thing not working on my 1985 245 is the stereo, but that's not needed to make the car run, I also wish it was faster, but that's to be expected from a B230A engine and a AW70 transmission..

Love your Volvo videos.

Engine sounds lovely, I do miss that sound.

Another way to confirm which terminals to link on that relay socket is the wire thickness. The ones switched by the relay contacts will be thicker than the wires for the relay coil.

The Legend lives, what a great motor to work on 💯❗

Top notch. Dealing with anything fuel related would probably scare me to doing it myself and end up farming out the job.

Excellent, ticking over nicely great to see the 240 on the road again 🎉🎉👍

Another problem solved. Well done Sledge.

Hi there, Gunsons colortune is an invaluable tool to have. I wonder if You could help Me, I have a failed front driver side (UK) engine mount failed. on My Volvo 740, 1986 2.3, estate. I have looked on Ebay and all the engine mount and gearbox rubbers look the same in size and shape. My question is are they the same volvo part used over a wide range of locations and models? Any help would be much appreciated thanks Dee

Happy to see it running. Well done!!

maybe fitting it with a wideband and gauge could help

Love the Bearded Wrencher call out

He's from Birmingham 🇬🇧 👍

Straighten that right out! 🤣 Great video buddy

Those bells😵

So, how long do you prime the pumps for when you are bypassing the switch? I recently replaced the entire fuel system because the car was left with a full tank of fuel, and it sat in the garage for 16 years, destroying the tank and pumps. I've checked to make sure pumps work and replaced relay. But it still won't start. I also replaced the hall sensor in the distributor and put a new fuze link under the hood next to the battery. Im lost at this point. Are there any suggestions? Thank yiu

Did you have a big problem disconnecting the fuel line from the fuel rail, mine is incredibly stuck?

Do they still have registration plates that are local to where you live in Germany, I see one of the cars have a B which I thought was Berlin and another something different?

The noise of the red block is so unique and lovely. Great fix fella