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No real power uphill

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No real power uphill

Postby Goffnwen » Mon Mar 05, 2018 11:24 pm

Hi - Our Motorhome does really well on the level but is struggling with going uphill.
It is a 1991 Automatic 2.5 engine and has had a new cambelt fitted.
When you try to go into the lower gears it copes and sounds okay with 3rd but 2 and 1 are no real good and sound like the engine is straining.

Any thoughts/ideas welcome.
Thanks

:D
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Re: No real power uphill

Postby rebuilder86 » Tue Mar 06, 2018 1:07 pm

any more info u can give us?
what is the engine. there are many variants.
Turbocharged or N/A
Have you owned it for a while and noticed this power issue recently, or has it been like this since u first owned it?

Turbocharger giving up can cause power loss, but so can compression issues, air filter, fuel filter, injectors, injector pump, fuel supply pump, lubrication, and cooling.
Need a bit mroe description or else there will bea sea of pointless internet armchair experts, which doesnt help you haha.
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Re: No real power uphill

Postby Goffnwen » Tue Mar 06, 2018 4:21 pm

I will try my best to give accurate info.
No Turbocharger, filters/oil were changed along with cam belt at a service in December.
We bought the M/H in late October - drove it back from Bristol. Then it was sluggish generally with a top speed (downhill wind behind us) of about 60. Up the hills of any kind it would slow right down to 23/25. We didn't use the lower gears then just as on auto. We only got the M/H back from the dealers/garage mid Feb so haven't done much in the way of large journeys yet.

We did a trip a week ago and it was happy doing 70 on the flat but still started going down on speed when on hills.
Went down the gears this time - sounded fine when in 3rd - 1 and 2 it was really struggling/noisy. but was possibly only dropping down the 40mph rather that the 25. It does sound like an old diesel engine anyway.
No power steering - we had electric power steering fitted.

It is better than when we first drove it as it has been serviced and the cam belt changed - it is just the issue of going up the hills which is a bit of a worry.
It also has the two batteries - one is the leisure battery for the m/h.
In the handbook which shows the engine with the two batteries the description is just diesel engine compartment. Definately not the turbo 2.5.

Not much help I suppose?
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Re: No real power uphill

Postby gotgcoalman » Tue Mar 06, 2018 5:44 pm

here's the killer question.
which injector pump has it got fitted?

Take a pic of the engine and post it :)
ne m'écoute pas je suis plein de merde.
A house without a dog is like a forum without a BJT.
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Re: No real power uphill

Postby cherniy_chack » Tue Mar 06, 2018 6:28 pm

Hi, Goffnwen .
Diesel does not pull in two cases: little fuel or late injection.
If the cold engine starts well, then the fuel is sufficient and the initial injection angle is set correctly.
If the engine does not pull up the hill and the car does not accelerate quickly in the plain, then a late dynamic injection, which depends on the pressure in the fuel pump housing.
This pressure is set by the valve.
Here, in Russian, the effect of pressure in the fuel pump housing on the operation of a diesel engine is described, the valve itself is shown and the method of its adjustment is described.
https://autodata.ru/article/all/operezh ... ka_diesel/
If you look, you'll find it in English.
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Re: No real power uphill

Postby ricc » Tue Mar 06, 2018 6:33 pm

if its a non turbo 2.5 d motorhome running somewhere near its max design weight its going to slow down on hills. using 1 or 2 instead of d just locks it in first or 2nd gear.

max weight full throttle in low gear is bound to sound noisy.

where are you? cos first thing you need is an experienced ear to see whats going on.....it could well be normal for an old transit.
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Re: No real power uphill

Postby cherniy_chack » Tue Mar 06, 2018 7:17 pm

Transit with the killed engine is not started already at 0 gr C, takes a liter of oil per 1000 km and normally pulls uphill.
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Re: No real power uphill

Postby rebuilder86 » Wed Mar 07, 2018 12:36 pm

how excactly does starting well in the cold mean teh fuel is sufficient? provided u mean, supply amount of fuel is sufficient im not sure i agree with that. idle requries less fuel, powering up a hill requires good supply and fuel flow, a dying supply pump, or a blocked fuel filter could be the casue there. If its not turbo, doubt the air filter would be an issue.
My turbo transit, (100ps , 73 kw) in perfect workign order feels laborious at the best of times, however it is able to climb ANY hill at 80 kph with about 600 kg payoad. (tools and supplies)
If you are geting max 30 kph up a hill in the best possible gear, something must be wrong, and id suspect its in the pump.
The pump for the turbo and NA varitns are different and differnet in price, to your favour!!
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Re: No real power uphill

Postby ricc » Wed Mar 07, 2018 6:12 pm

" however it is able to climb ANY hill at 80 kph with about 600 kg payoad. (tools and supplies)"

where can i get one of these magic vans
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Re: No real power uphill

Postby cherniy_chack » Wed Mar 07, 2018 8:15 pm

rebuilder86 wrote:My turbo transit, (100ps , 73 kw) in perfect workign order feels laborious at the best of times, however it is able to climb ANY hill at 80 kph with about 600 kg payoad. (tools and supplies)

My haikub 100 HP in its best times with a cargo of more than 1 ton did not lag behind the VAZ 2105 in the race on the Dnieper slopes! :D
Dirt in the fuel filter can interfere with the acceleration of the car uphill, but it is very difficult, so to kill the filter. :lol:
But the dispersal starts well, and then the motor stops pulling and can decay.
If the motor does not pull right away, it's not in the filter.
Due to a faulty boost pump, the motor may not start properly, but after starting the engine it runs well.
Loss of diesel power is usually associated with improper installation of the initial injection angle, with the motor running poorly, or with an incorrect dynamic injection angle, depending on the fuel pressure in the injection pump housing.
To start, you need to increase the static angle of the timing of the injection, especially since there was an intervention in the installation when replacing the timing belt.
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Re: No real power uphill

Postby transit-town » Thu Mar 08, 2018 4:40 am

I love the “I know more than you and I’m always right banter”
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Re: No real power uphill

Postby cherniy_chack » Thu Mar 08, 2018 10:08 am

If you do not know and ask, be ready to hear any answers.
If you know the answer to the question of the topic, give the correct answer.
I do not know the correct answer, but I know the most likely answers.
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Re: No real power uphill

Postby Goffnwen » Thu Mar 08, 2018 5:57 pm

As requested one engine
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Re: No real power uphill

Postby gotgcoalman » Thu Mar 08, 2018 6:46 pm

I was hoping to see a Bosch pump sat on it :(
ne m'écoute pas je suis plein de merde.
A house without a dog is like a forum without a BJT.
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Re: No real power uphill

Postby Goffnwen » Thu Mar 08, 2018 7:24 pm

gotgcoalman wrote:I was hoping to see a Bosch pump sat on it :(



Sorry? Not much I can do about that... :(
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