by "Brickman" (legomaniacman)
Published 06/25/2017 at 09:26
by "Brickman" (legomaniacman)
Published 06/25/2017 at 09:26
No Tags
STARS: 0
Yesterday I put in my new Delphi fuel pump and wix filter on my 96 caravan. Hoping that will solve my no fuel symptoms.
I Reconnect everything, add 10 gallons of gas, and turn the key 3 times to prime the pump. I hear the pump prime, start van... start, start some more and no running van :(
I get under the van to make sure pump is working while someone starts engine and it hums / buzzes like it should.
I should invest in a fuel pressure gauge, but I like to live dangerously :D. I checked for any pressure at the fuel test port and I had no gas. So I remove the fuel line to the injector rail and have the fuel pump prime. I see nothing. Start engine and gas comes out the line about 2 inches, mostly just a centimeter. For my educated guess is that is not 49 psi as it should be?
Maybe the Amazon reviews were right, it is a junk fuel pump? Delphi FG0215
"pip bip - choose Corrour" (hhgttg69)
06/25/2017 at 09:29, STARS: 0
could just be plain unlucky with a dud one
"Echo51" (echo2047)
06/25/2017 at 09:43, STARS: 0
Replaced filter, blown through the gas lines to make sure they’re not blocked?
"Dave the car guy , still here" (a3dave)
06/25/2017 at 09:43, STARS: 0
Dephi isn’t the same as the old AC Delco quality. They are sometimes repackaged product from various suppliers. Its a hit and miss game with Delphi parts. I have heard many customer complaints.
"Brickman" (legomaniacman)
06/25/2017 at 11:03, STARS: 0
most likely.
"AMGtech - now with more recalls!" (amgtech)
06/25/2017 at 11:06, STARS: 0
It probably is a bad pump, but I would check power and ground while the pump is actuated and plugged in. It’s possible that the wiring/something isn’t supporting the needs of the pump which would result in low voltage under load. It’s an easy two minute test with a volt meter.
"Brickman" (legomaniacman)
06/25/2017 at 11:07, STARS: 0
I back fed compressed air through the connection where the fuel rail connects to where the filter goes. I undid the fuel line to filter so no air went in tank. Little bit of gas, but nothing else.
"Brickman" (legomaniacman)
06/25/2017 at 11:10, STARS: 0
Now im one of those complainers :)
"Dave the car guy , still here" (a3dave)
06/25/2017 at 11:17, STARS: 0
Make sure its not the computer cutting off the fuel pump power. Some engine computer cut the power if the engine doesn’t start within a certain time span. If you can figure out which two terminals power the pump you can test it with any 12v battery. Just make sure you have the polarity correct because the pump impeller will be junk if ran in reverse.
"Brickman" (legomaniacman)
06/25/2017 at 12:57, STARS: 1
I did test the original pump that way, which was dead. This one works, but I’ll probe the 12v wire to see if I have any voltage drops when starting. I’ll do that tomorrow. Too darn hot outside.
"Brickman" (legomaniacman)
06/25/2017 at 12:59, STARS: 0
Fuel pump runs, just no pressure. If any it would be less than 10 psi. Thats how I tested the original pump with a 12v battery and I had nothing. Also checked the cam and crank sensors, fuel fuse, fuel pump and ASD relay. All work like they should. Tomorrow I’ll probe the 12v wire to the pump and see if I have any voltage drops while starting van.
"gogmorgo - rowing gears in a Grand Cherokee" (gogmorgo)
06/25/2017 at 13:19, STARS: 0
Delphi pumps are garbage. Mine in my MJ is almost as loud as the dying Bosch I suspected was still original at 310,000 miles, and the adapters don’t fit at all, to the point I had to ghetto-ass rig it in there with hose clamps and I’m pretty sure it’s come out of the sending unit completely because after a month and 7000 miles I can now only get 2/3 of the gas out of the tank. But if it’s buzzing it should be working at least enough to start and idle, even if it’s not making enough pressure to drive.
Few things I would check are:
The filter: lots are directional with a check valve. There should either be an arrow indicating the direction of flow through the filter (pointing towards the engine) or else in/out marked. In is where the fuel enters the filter. Also if it’s not been changed for a while you should do that if you have to replace the pump.
When you had the pump out, there’s a little rubber hose connecting the pump to the sending unit. If it deteriorates all your pump ends up doing is pumping gas out into the tank, like a garden hose full of holes, you get no pressure at the outlet. Also if it wasn’t secured properly it can very easily pop off, so all the gas is just going around in the tank even with the pump working. Probably (but I can’t confirm) a symptom of this would be the pump not shutting off with the key on. It should run long enough to get up to pressure, usually only a second or two, then stop, and if you cycle the key it should eventually stop cycling because it’s up to pressure. So my theory is if you turn the key on and it runs forever, or if it comes on for a few seconds every time you turn the ignition on, it’s not building pressure properly, meaning the gas isn’t completing the circuit. But again, I could be way off base with that, it’s just a behaviour I’ve noticed on my 27-year-old Jeep and 21-year-old Lada when they’re out of fuel, the pump runs longer than normal and cycles every time I hit the key.
And that brings me nicely around to my last idea. This is probably obvious so please don’t get offended... but you did put enough gas in it the pump’s picking it up and not sucking air, right?
"gogmorgo - rowing gears in a Grand Cherokee" (gogmorgo)
06/25/2017 at 13:20, STARS: 0
Also. Most parts stores that rent tools will loan you a pressure gauge. Or they’re like $30 for a cheap one. I strongly recommend checking fuel pressure before you start looking into replacing the new pump. And then do the other stuff first.
"Brickman" (legomaniacman)
06/25/2017 at 15:16, STARS: 0
Fuel pump has no hoses. Inlet strainer picks up fuel from bottom of tank. Silver thing is the pressure regulator. Vents fuel back into take if too much pressure. No hose needed there.
New filter is put on the same as the old one was. The hard molded hoses makes it hard to mix it up.
Pump turns on for 2 seconds for each time the key is in the on position
Put 10 gallons of gas. Plenty for it to suck up :)
Do need a pressure tester. Autozone wanted $150 and im like nope. Amazon has one an Actron for $31. DO have a noid light tester to make sure my injectors are firing. Can only check Ohms and according to the repair manual 12 ohms is fine.
"gogmorgo - rowing gears in a Grand Cherokee" (gogmorgo)
06/25/2017 at 19:39, STARS: 0
$150? That’s a fancy tester. All mine is is a hose and analogue pressure gauge. It was $50 or $60 at a small-town mom&pop parts store in Nowheresville, SK, canadialand, don’t remember the brand, and the packaging went AWOL cause I bought it cause I needed it. They were $40 at the discount parts chain I worked at.
I’m out of ideas.
"Long-Voyager" (long-voyager)
03/29/2018 at 07:29, STARS: 0
All replacement pumps are garbage.