Starting/Compression issue BG EPR solution? - Defender Source
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  #1  
Old June 3rd, 2015, 06:19 PM
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Ed Mah
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Starting/Compression issue BG EPR solution?

My NAS 110 has a 4.0 with about 52K on the clock. Lately when I try to start the engine it turns and the starters goes but it doesn't fire up right away. It takes a while and sometimes several times before it starts up. All Amsoil since I purchased it 50K miles ago. My regular shop thinks it may be a compression issue and recommended to try a BG system ( I assume BG EPR).
1. Any thoughts on the starting issue? Compression issue?
2 Anyone have experience with BG products if its worth trying?
3. Anything help is appreciated.
Thanks,
Ed
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  #2  
Old June 3rd, 2015, 06:40 PM
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Robert Dassler
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If this is a cold start, try cycling the key on until the check engine light shuts off. Turn the key off for 10 seconds. Turn the key back on but wait until the check engine light goes off to engage the starter. This will run the fuel pump twice and fully prime the fuel system. Odds are that the check valve in the pump has some debris in it and is letting the fuel system bleed down.

If this is a hot start, try starting with the throttle wide open. The injectors may be dirty and letting fuel seep into the cylinder causing a flood condition. A quality injector cleaner may solve the problem.
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  #3  
Old June 3rd, 2015, 06:49 PM
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Ed Mah
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Hi Rob,
Yes, it is from a cold start.
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  #4  
Old June 3rd, 2015, 07:08 PM
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Chris Snyder
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Definitely try cycling the fuel pump a few times as Rob detailed. Key on until the pump stops. Key off until you hear a relay click. Rinse. Repeat.

If it starts easier after cycling a few times, you're on you way to narrowing the problem down significantly.
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Old June 6th, 2015, 04:25 PM
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Ed Mah
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Thanks gents. I will try this as soon as I get it back from the shop next tues.

On a side note anyone have experience or feedback on BG products?
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Old June 6th, 2015, 04:54 PM
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Jason England
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Quote:
Originally Posted by emah View Post
My NAS 110 has a 4.0 with about 52K on the clock. Lately when I try to start the engine it turns and the starters goes but it doesn't fire up right away. It takes a while and sometimes several times before it starts up. All Amsoil since I purchased it 50K miles ago. My regular shop thinks it may be a compression issue and recommended to try a BG system ( I assume BG EPR).
1. Any thoughts on the starting issue? Compression issue?
2 Anyone have experience with BG products if its worth trying?
3. Anything help is appreciated.
Thanks,
Ed
Firstly find a new shop ... there is a way to test compression and throwing cans of voodoo oil into the mix isn't it. If land rover didn't say put it in the truck then I wouldn't do it ...

I would ask the shop to do some actual diagnosis by testing things. For example if they tested the cylinder pressures what were the readings? That would indicate if you had a compression issue.

Anyway sounds like total BS but seeing as I can't actually measure anything I'd start with things that commonly cause starting issues ... AICV is the first ... they are notoriously a cause of hard starting and irregular running / idle.

Try starting with your foot hard to the floor to quickly test this ... then clean it with carb cleaner ... or buy a new one.
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  #7  
Old June 16th, 2015, 04:01 PM
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Ed Mah
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Rob and Chris so I finally remembered to get back to you on this and turning on and off the key definitely helped to start the engine. Fuel relay problem?
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  #8  
Old June 16th, 2015, 05:36 PM
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Bill Adams
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Very much doubt a fuel supply issue, although it's certainly a possibility.
Try this cheap thing first:
Drizzle raw gas directly into intake. Loosen the clamp and remove the hose from the intake. Hold open the throttle plate and slosh a quarter cup of gas in there. Replace hose and go try to fire the engine. If it fires, then you have established it's not a spark problem. If it is still not firing then:

Look for a loose, cracked or missing hoses going into the intake box on top of the engine. This will cause excessive lean and make it difficult to start the engine and it will run like poo.

If that doesn't improve things then:

Undo fuel supply to fuel rail fitting. Place rag under. Have helper turn key to ON. Observe if there is strong flow of gas. If it starts coming out have helper turn key off immediately. Reattach fuel line fitting. Fuel pump and relay are fine. If no gas suspect A fuel pump fuse B fuel pump.

If OK then:

Do a tune up. New cap rotor wires plugs.

If that fails to improve it, I'd suspect the ignition amp module.
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  #9  
Old June 17th, 2015, 06:42 AM
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Ed, how much/regularly do you get to drive your truck? In my experience these suckers behave better when they sit less often. Getting it to operating temps for extended periods helps too. I've have cel go out on its own after a 3 hour trips.

Btw, I agree, you need another mechanic. Easier said than done sometimes though.
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  #10  
Old June 17th, 2015, 08:20 AM
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Quote:
Originally Posted by 1of40 View Post
Ed, how much/regularly do you get to drive your truck? In my experience these suckers behave better when they sit less often. Getting it to operating temps for extended periods helps too. I've have cel go out on its own after a 3 hour trips.

Btw, I agree, you need another mechanic. Easier said than done sometimes though.
x2 they need to be run, Shell V-power and drive it like a rental car.
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