2003 Hilux 5L-E slow as buggery

Thanks for the reply qubert.

I havent looked at the valve clearances yet. I guess a valve could have tightened up a bit but there isnt really any associated "putting" noise from the exhaust. Do these engines have tappets or shims?

You might be right about the fuel pump, though i hope not because that straight away means big bucks. I would have thought there would be damage to the injectors themselves if lots of red dust had gotten past the filters causing black smoke from unburnt juice, which there is none.

I cant adjust the fuel delivery on the 5L-E either like on the 3/5L, its all up to the EFI. I have a spare fuel pump off a petrol rodeo that i might hookup to test your theory.

Is there a DIY injector pump kit for the 5L-E? I'm pretty handy with the tools.

Scooby,referring to the valves, they wont get noisy as they tighten themselves up not loosen them selves, and its quit common for them to do it. The valves were done twice on my old 2.8 and both times were out of spec. They are shim and bucket set up. Regards Steve M

Thanks for the reply's guys.

I dont think i can adjust the pump timing Scooby as mine is EFI and yours is a mechanical pump. I dont know why they went EFI as there was nothing wrong with the prev design and its not exactly a high tech common rail multi valve engine. The gas sounds like the go but i have to get this prob sorted before any performance enhancing goes on. I didnt think the benefits of gas on a nat aspirated diesel was meant to be all that good. 20% extra is huge!

I did the timing belt myself Nav 8 but it was done properly. I've done a 2 3L"s previosly. It had the same amount of dismall power before hand anyway so i can rule out timing as an issue.

Initially i thought the donk had been dusted too but after 2000km it hasnt burned a drop of oil. I did whip the glow plugs out the other day to give it a compression test but blew my petrol tester to smitherines. Another lesson learnt the hard way.

The line isnt blocked i checked. It still uses 12L/100km which is about right. It runs a bit hairy, just not nice and smooth like a goodun should. Another symptom that is worth noting is when it gets up to temperature it is harder to start and makes a bit of a clunk when she fires up. Like comp is low on a cyclinder and extra weight is placed on one end of the crank when it starts.

I'm going to pull the rocker cover off and check the clearances and if there ok i will whip the injector pump off and check it over, maybe runa kit through it. I'll let yuz know how it pans out.

Cheers

Well my 5LE with 140k on the clock and a high top ARB canopy otherwise relatively empty, gets 10L/100km or less no matter what I do, though i stay at or under 100km/hr.

The factory turbo was known to get the 12L/100km so there could be a sign for you, perhaps.

Also, this is the link to my post here where i got a small bonus at work and decided to pump up my power a tad, got a chip for the 5LE which cannot be put on the 5L simply because it wasn't an EFI. I didn't want a turbo as the factory turbo had a stronger clutch and gearbox than the 5LE so I didn't feel a need to test my components with the aftermarket turbo though of course did not get the level of gains that comes with a turbo.

http://www.exploroz.com/Forum/Topic/59186/Hilux_30_non-turbo_Chip_Dyno_test.aspx?Print=1&fq=59186

By the look of that link you could find it at Post 59186 i suppose.

Ooh those are stump pulling figures Scooby.

My Lister makes more grunt than that!

Well if that is what your lux is putting out then the theory of mine making >60hp should be halved.

Jay

I'll look into it Porl. There was a bit of crap around my intake butterfly when i pulled the inlet pipe off. Sort of a thick oily grease from the rocker vent i reckon but if i do pull the intake manifold off, there might be a whole lot more of it hidden in there.

Cheers

Jay

Well i finally found the problem.

I had a tight inlet valve on No 3 piston. All my exhaust valves measured .4mm clearance(cold) and 1 & 4 inlets measured .2mm, No 2 was .15mm and no 3 i couldnt get any feeler guage under it so i went to the engine shop in Midland and swapped the shim for one 9 "thou" thinner which equates to about .25mm and when installed gave me .15mm clearance which is still tight compared to the .25 -.4mm clearances recommended in my manual but i'm not pulling the rocker cover off again.

The engine idles so much nicer now and is way quieter and has about 25% more power (up to about 30hp now). Much nicer to drive and hopefully wiill get a bit better fuel economy.

Amazing what .4mm can do to a motor. The guy at the engine reco shop reckons its not so much the valve seat recessing in the head but the valve stretching, unusual for an inlet though he thought.

Thanks for the help everyone and i hope this post helps someone else out with a sililar problem in the future.

Great news and that one will be printed out for my future reference file.

The exploroz thread on the manifold gunk on our 3.0D's was: 58917