95 fuel pump prob? - Land Rovers Only

jls5085 · 09-05-2008, 07:20 PM

I have a 95 v8i disco. When driving on the highway the engine will stall and quickly recover. This happens about every 3 to 5 miles. I've replaced rotor, cap, plugs, and wires. I checked for codes and there were none. Tested tps and it was ok. I checked fuel pressure and it was around 27 and when the motor (hickupped) the pressure would drop to 15psi. Has anyone had this kind of problem? Any help would greatly be appreciated!

Adam in NYC USA · 09-05-2008, 10:19 PM

Check the fuel pump and the fuel pump relay. If you jump a short around the relay, and the problem disappears, youhave a hiccuping relay.

Rovin4life · 09-07-2008, 07:48 AM

does it hiccup if the vehicle goes over a bump, try shaking the relay.

it could be a loose connection or an open one that is getting bumped/

jls5085 · 09-07-2008, 11:25 AM

I bypassed the relay and drove the truck about 5 min. no hickups at all. Then the service engine light came on. I pulled over and put the relay back in. The problem immediately returned. I have two relays on order that will be here next week. Hope that's the problem. Thanks for your help guys!

jls5085 · 09-12-2008, 02:46 PM

I've changed the fuel pump relay and the problem still exists. Do I need to change the fuel pump now?

Adam in NYC USA · 09-12-2008, 10:55 PM

Check the pressure level of your fuel pump,read your codes, reset the ECU and read your codes again. Your codes should give you plenty of clues.

jls5085 · 09-29-2008, 08:34 PM

I changed the fuel pump and it fixed the problem. Thanks for everyones help. This site has helped me alot with my truck!

Wayne1ss · 10-08-2008, 07:14 PM

Hey ,, just wanted to add .. You might want to remove the fuel pump harness ,,to the pump + make sure to look at the base of the wiring pins + make sure they are not brown.Will need a new harness ,,if they are ..

Rovin4life · 10-08-2008, 07:22 PM

next time you suspect the pump tape a fuel pressure gauge to the windshield and drive around and observe it.

09-05-2008, 07:20 PM	#1 (permalink)
jls5085 Member Join Date: Sep 2008 Location: Earth Posts: 4 Gallery: 0	95 fuel pump prob? I have a 95 v8i disco. When driving on the highway the engine will stall and quickly recover. This happens about every 3 to 5 miles. I've replaced rotor, cap, plugs, and wires. I checked for codes and there were none. Tested tps and it was ok. I checked fuel pressure and it was around 27 and when the motor (hickupped) the pressure would drop to 15psi. Has anyone had this kind of problem? Any help would greatly be appreciated!

09-05-2008, 10:19 PM	#2 (permalink)
Adam in NYC USA The Urban Motorist Join Date: Sep 2004 Location: New York City Posts: 985 Gallery: 0	Check the fuel pump and the fuel pump relay. If you jump a short around the relay, and the problem disappears, youhave a hiccuping relay. __________________ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Owner of a 1996 Land Rover Discovery 1 in Beluga Black or the Dirt of the Day. Where we are going,we don't need roads. Nothing in education is so astonishing as the amount of ignorance it accumulates in the form of inert facts. ‘The Education of Henry Adams’ (1907) ch. 25

09-07-2008, 07:48 AM	#3 (permalink)
Rovin4life Former NAS LR TECH, Current AUS LR TECH Join Date: Oct 2005 Location: DOWN UNDER Posts: 1,884 Gallery: 0	does it hiccup if the vehicle goes over a bump, try shaking the relay. it could be a loose connection or an open one that is getting bumped/ __________________ I work on Rovers. Got a question just ask.

10-08-2008, 07:22 PM	#9 (permalink)
Rovin4life Former NAS LR TECH, Current AUS LR TECH Join Date: Oct 2005 Location: DOWN UNDER Posts: 1,884 Gallery: 0	next time you suspect the pump tape a fuel pressure gauge to the windshield and drive around and observe it. __________________ I work on Rovers. Got a question just ask.

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09-07-2008, 11:25 AM	#4 (permalink)
jls5085 Member Join Date: Sep 2008 Location: Earth Posts: 4 Gallery: 0	I bypassed the relay and drove the truck about 5 min. no hickups at all. Then the service engine light came on. I pulled over and put the relay back in. The problem immediately returned. I have two relays on order that will be here next week. Hope that's the problem. Thanks for your help guys!

09-12-2008, 02:46 PM	#5 (permalink)
jls5085 Member Join Date: Sep 2008 Location: Earth Posts: 4 Gallery: 0	I've changed the fuel pump relay and the problem still exists. Do I need to change the fuel pump now?

09-12-2008, 10:55 PM	#6 (permalink)
Adam in NYC USA The Urban Motorist Join Date: Sep 2004 Location: New York City Posts: 985 Gallery: 0	Check the pressure level of your fuel pump,read your codes, reset the ECU and read your codes again. Your codes should give you plenty of clues.

09-29-2008, 08:34 PM	#7 (permalink)
jls5085 Member Join Date: Sep 2008 Location: Earth Posts: 4 Gallery: 0	I changed the fuel pump and it fixed the problem. Thanks for everyones help. This site has helped me alot with my truck!

10-08-2008, 07:14 PM	#8 (permalink)
Wayne1ss Member Join Date: Oct 2008 Posts: 5 Gallery: 0	Hey ,, just wanted to add .. You might want to remove the fuel pump harness ,,to the pump + make sure to look at the base of the wiring pins + make sure they are not brown.Will need a new harness ,,if they are ..

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