1990 240 DL secondary fuel pre-pump
#1
01-17-2015, 05:51 PM
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1990 240 DL secondary fuel pre-pump
hi all and good day,
1990 240 Dl with issues that sound like what happens when the low pressure, high flow secondary fuel pre-pump is shot. I have not looked at the car yet but i found this web page top ten thing that go wrong Top 10 Problems with 240 Volvos
The car has all the symptoms of the pre-pump going bad. My questions are this Due to the fact that the pre-pump is in the gas tank.
1. Is the pre-pump accessible through the trunk of the car or does the fuel tank have to be dropped?
2. what kind of test can be run to identify if this is the problem?
3. if this is the problem where is the best place to obtain a new pump?
thank you all for your time and energy
1990 240 Dl with issues that sound like what happens when the low pressure, high flow secondary fuel pre-pump is shot. I have not looked at the car yet but i found this web page top ten thing that go wrong Top 10 Problems with 240 Volvos
The car has all the symptoms of the pre-pump going bad. My questions are this Due to the fact that the pre-pump is in the gas tank.
1. Is the pre-pump accessible through the trunk of the car or does the fuel tank have to be dropped?
2. what kind of test can be run to identify if this is the problem?
3. if this is the problem where is the best place to obtain a new pump?
thank you all for your time and energy
#2
01-17-2015, 08:01 PM
the tank pump is indeed in the tank, and its accessed from a plate thats under the trunk mat on a sedan, and behind the back seat under the floor panel on a wagon.
the car normallly will run more or less OK with a bad tank pump as long as there's at least 1/2 tank of gas. when the gas tank gets below 1/3 full, your engine might lose power and stumble under heavy throttle acceleration. also without the tank pump running, the main pressure pump under the car has to work much harder.
you can easily test the two pumps seperately on a 240 with a alligator clip jumper wire.. find and remove the fuse for the in-tank pump (fuse 4). with the car turned off, use a jumper wire to connect the left side of fuse 6 (always powered) to the RIGHT side clip of the missing fuse 4, and the in-tank pump should run. if you leave this jumper in place, and remove the gas cap and listen to the filler pipe, you should hear it humming.
disconnect that jumper, replace fuse 4, and install the jumper from left side of fuse 6 to left side of fuse 4, and now both pumps should run, you should hear the main pump under the car near the back seat whirring away.
the car normallly will run more or less OK with a bad tank pump as long as there's at least 1/2 tank of gas. when the gas tank gets below 1/3 full, your engine might lose power and stumble under heavy throttle acceleration. also without the tank pump running, the main pressure pump under the car has to work much harder.
you can easily test the two pumps seperately on a 240 with a alligator clip jumper wire.. find and remove the fuse for the in-tank pump (fuse 4). with the car turned off, use a jumper wire to connect the left side of fuse 6 (always powered) to the RIGHT side clip of the missing fuse 4, and the in-tank pump should run. if you leave this jumper in place, and remove the gas cap and listen to the filler pipe, you should hear it humming.
disconnect that jumper, replace fuse 4, and install the jumper from left side of fuse 6 to left side of fuse 4, and now both pumps should run, you should hear the main pump under the car near the back seat whirring away.
#3
01-17-2015, 08:27 PM
link
In the Tank - 240 Volvo Tank Pump and Sender
-do the job outdoors, not in garage
-remember to unhook your battery
-have a fire extinguisher nearby that works
-try to do the job with a 1/2 or less tank of fuel
-no smoke, no sparks or incandescent bulbs
In the Tank - 240 Volvo Tank Pump and Sender
-do the job outdoors, not in garage
-remember to unhook your battery
-have a fire extinguisher nearby that works
-try to do the job with a 1/2 or less tank of fuel
-no smoke, no sparks or incandescent bulbs
Last edited by fochs; 01-17-2015 at 08:33 PM.
#4
01-18-2015, 02:06 PM
I did this test myself, you'll hear the main pump accompanied by a loud buzz, secondary will take a good ear.
Changing the pump out of the back isn't too tricky, I'd disconnect the battery just in case, and take a good look at the link posted above.
From what I can tell the hardest bit is finding a good aftermarket pump, lots of cheap Chinese stuff flooding the market.
Changing the pump out of the back isn't too tricky, I'd disconnect the battery just in case, and take a good look at the link posted above.
From what I can tell the hardest bit is finding a good aftermarket pump, lots of cheap Chinese stuff flooding the market.
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