Hi!
Sorry for my funny english. I'm from Sweden. (Dont yell at me yet, I dont work for Volvo!)
Yesterday my 740 SE -92 with B230F suddenly refused to start. It started but almost immediately died. When listening carefully I did not hear that 1,5 second zzz sound when turning the ignition on. Ok, the white fuelpump relay I thought and replaced it. Same problem, no zzz sound! Had to tow the car home. This morning I thought I'd have a look at it. Just turned the key for fun and the zzz sound was back! The car ran like new. Thought I should check the main fuelpump but couldn't find any! Manuals and various discussions on Internet states that there should be 2 fuelpumps. One in the tank and another one by the filter. Are there 740:s with only one fuelpump (in tank)?
Thanks,
Bengt

Thanks a lot!
I have now learned 3 things...
1 My car has the "Regina-system".
2 My car has only got one fuelpump and I intend to replace it to try to cure the problems.
3 When talking to mechanic he sayd these type of fuelpumps often dies after 180000 to 200000 km! (Mine has 190000 km!)
--
Bengt

(Sorry, this is going to be a long post!)
After reading some posts about changing the Regina Fuel Pump I felt ready yesterday evening. Thought I'd share my experiences before I forget about it. I sure want to forget it because it was one hell of a job. I mean compared to what changing a fuel pump ought to be.

I bought a new fuelpump and the large round rubber ring at volvo. (1001 swedish krones!) Mistake number one. I should also have bought the sock-like filter that sits on the bottom of the pump. This is not included. So stupid...

So, off with the plate in the trunk and off with the left rear wheel. Started working with all of the hose clamps. They were not hose clamps anymore. They were rust! Remember, I'm from Sweden. We have winter 6 months a year and they put salt on the roads...

There were 4 hoses. One big that the fuel enters the tank from and one little smaller (for ventilation?). No problem. Then there were the 2 fuel lines. The return line was clamped. No problem. There were plenty of hose so i just cut it off as near as possible to get a new fresh end when later mounting. The other one (the pressure line to the filter under the car) sat on a strange rotating connection and there were no hose clamp. This hose was another type. A thin stiff inner hose inside with a normal looking softer rubber hose on the outside. What the hell should I do with this one i thought and finally I could not think of anything other than cutting this one off too.

The electrical connection could be traced to a connection way up by the left trunk lid. Pulled it and finally got the wires out and free.

Now the huge collar could be loosened to free the whole setup. Counterclockwise turning and wiggeling the unit finally got it out. Puh. The sweat was running. We have had a couple of days now with around 30 Celsius! Not used to that kind of heat! Looked at the watch. Holy shit, 2 hours wasted already.

Ok, on with the new pump on the funny looking gizmo. Had to solder the 2 electrical lines. (Why the hell couldn't they have some kind of intelligent connections instead.) Put the unit back in the tank. Remembered (thank god) a post saying "what ever you do, put the rubber ring into the tank first and not around the unit as first comes to mind!". Smeared vaseline to the unit and there it was! Put on all hoses with new clamps. The "pressure" line though was impossible to get on its weak looking plastic connection (nipple?). (Is it called nipple in english or has that to do with women only?) Warmed it up good (not with a lighter!) and put silicone spray on the connection. Pressed it on as long in as I could and clamped it too. Ready! Did it work? Connected the battery. Turned on ignition. Yes! a whirring sound! Hope and pray that this was the problem after all this work just for changing a fuelpump. It was sure better and simpler in the old days!
--
Bengt

Hey, great post with good information. I have a Regina system too. While you were back there, did you happen to notice if there was something that looked like a check valve in the line? That valve is supposed to keep pressure in the line when you shut off your car. I think I might have to replace mine, but a lot of people aren't even sure if the Regina fuel system has one.

Thanks!
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'
Note: Page currently down

Thanks!
What does a Check Valve look like? I followed the lines from the tank and forward to see which one got to the filter. There were some connections here and there but nothing else as I see it.

--
Bengt

you know, i actually have no idea what it looks. i was hoping you could tell me. :)
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'
Note: Page currently down

If you have two pumps, the main is directly under the drivers seat in a "basket" mounted to the undercariage. The prepump is mounted in the tank itself.


I haven't any experience with Euro-Spec and non-turbo models. But from the description sound like a bad connection, wiring, or realy somewhere.


MD
--
MD

My '91 740 (non turbo) has only a tank pump. It has the Bendix "Rex Regina" ignition and fuel management system, not the typical Bosch system.

If your car has the "radio suppression relay" (which is under the hood), you should be suspicious of it.

I resoldered my fuel pump relay when it failed and left my wife stranded on the highway. Two weeks later, the suppression relay did exactly the same thing with exactly the same results. I resoldered it, too. In fact, I resoldered EVERY relay I could find in the car.

That was two years ago and everything has run fine since.

The suppression controls power to the injectors. If this relay fails, the injectors are dead.

Near the suppression relay, under the hood, you should find an identical relay (which is for the electric fan). In an emergency, and also as a good diagnostic, you can exchange the fan relay with the suppression relay.
--
Don Foster (near Cape Cod, MA)

Hi Don,

sorry about the double message, but my question is:

do 740's with regina FI system have a radio supresion relay? and if they do what does it look like? I've checked under the hood in my 740 but don't see it.
Thank you
--
John '88 240, '92 740 Tampa Bay

"...do 740's with regina FI system have a radio supresion relay?"

Mine does.

"...what does it look like?"

Mine is a small rectangular box, about 1"x1"x1", black plastic. It's mounted near the right strut tower and has an identical twin mounted a few inches away (for the electric auxiliary fan).

"... checked under the hood in my 740 but don't see it..."

'89 might have been the first year for it -- don't know for sure.
--
Don Foster (near Cape Cod, MA)

Thanks Don for your input.

I found a black box like you described by the right strut tower, but there was only one PN# 1323592-1. There were no loose wires like somebody removed the other relay.

My brick is '92 745 with the regina FI. So is the above mentioned relay an RSR or a A/C fan relay? and waht happened to the other relay?
Thanks.
--
John '88 240, '92 740 Tampa Bay

"...is the above mentioned relay an RSR or a A/C fan relay?"

I honestly don't know. If it were my car, I'd start it and let it idle while I unplugged the relay. If the engine quits, it's likely the relay's the suppression relay. If nothing happens, it's likely to be the auxillary fan relay.

"...waht happened to the other relay?"

Dunno. I'm not even positive your car should have one, but it's likely to have both. The other relay may be located under something or nearby.

If you decide to resolder relays, the relays from under dash have a "pop off" plastic cover. The relays from under hood have sealed plastic case. You must cut the thin bead of sealant around the case, and then reseal with RTV when you reassemble.
--
Don Foster (near Cape Cod, MA)

Thanks Don.
--
John '88 240, '92 740 Tampa Bay