Hissing - Land Rovers Only

johnnybob06 · 05-10-2007, 12:57 AM

When I first start up my truck, every 11 seconds (I counted, haha) I hear a hiss. I sounds like its coming from the bottom of the truck, on the right side.. I just can't pinpoint it!

When I put it in drive and start driving, the hissing stops.. If I stop the truck, you still don't hear it..

What could it be??

Thanks!!

John-Robert

Disco Mike · 05-10-2007, 05:42 AM

Sre you sure you are not hearing the SLS pump? Try starting your truck leaving the drivers door open, do you still hear it, if not you ar hearing your pump leveling out your truck.
Mike

Rondo · 05-10-2007, 06:05 AM

If it is coming on only when you start up the truck it is possibly the secondary air injection (SAI) pump. It runs for a short period only after start up to help alleviate poor emissions. The SAI is easy to trace on the '03; the silver pipes along the back of the engine (which prevent you from changing your spark plug wires) carry the air to the exhaust manifold. With the hood open, have someone start the car and it should be pretty easy to pinpoint if there is a leak in the system.

05-10-2007, 12:57 AM	#1 (permalink)
johnnybob06 Senior Member Join Date: Jan 2007 Location: Deeeeppp South Texas Posts: 199 Gallery: 0	Hissing When I first start up my truck, every 11 seconds (I counted, haha) I hear a hiss. I sounds like its coming from the bottom of the truck, on the right side.. I just can't pinpoint it! When I put it in drive and start driving, the hissing stops.. If I stop the truck, you still don't hear it.. What could it be?? Thanks!! John-Robert __________________ 2003 Land Rover SE7 - Stock Hardon Karmon speakers - Stock Navigation System - Cold Weather Package - SLS - ACE

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Remove Advertisements Sponsored Links
Land Rovers Only - Land Rover Forum Advertisement

05-10-2007, 05:42 AM	#2 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,771 Gallery: 0	Sre you sure you are not hearing the SLS pump? Try starting your truck leaving the drivers door open, do you still hear it, if not you ar hearing your pump leveling out your truck. Mike

05-10-2007, 06:05 AM	#3 (permalink)
Rondo California Dreamin' Join Date: Apr 2007 Location: San Diego Posts: 285 Gallery: 0	If it is coming on only when you start up the truck it is possibly the secondary air injection (SAI) pump. It runs for a short period only after start up to help alleviate poor emissions. The SAI is easy to trace on the '03; the silver pipes along the back of the engine (which prevent you from changing your spark plug wires) carry the air to the exhaust manifold. With the hood open, have someone start the car and it should be pretty easy to pinpoint if there is a leak in the system.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)