Reply With QuoteSounds like it is pinging - check your timing. Likewise while a 3.9 should run OK on 91 Ron fuel - try it on 95 or 98 Octane and see if the issue continues.
Master
Hi
The rangie has had a issue which im chasing. Putting it into shop i a week or so but would like to figure it out.
Symptom is when under load such as going up a slight hill sitting around 3000 it starts popping not really back firing more just popping. Then if you drop it down a gear it starts making a rattling noise like a loose exhaust and no real power just noise. once over the hill it runs rough for a while and then is ok again after a while.
I have changed leads to see if that helps but didn't checked plugs which were black but didn't change after a clean. Next i was going to change coil
Any help or pointers would be great.
Cheers
LordRover
SupporterSounds like it is pinging - check your timing. Likewise while a 3.9 should run OK on 91 Ron fuel - try it on 95 or 98 Octane and see if the issue continues.
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
Swaggie
SubscriberSounds like sticking exhaust valves to me.
quite common on 3.9.
regards Philip A
Master
Will check today. After driving to work it seems to be getting worse. Any real input with right foot and it gets upset. Always run on 95ronOriginally Posted by garrycol
Wizard
Under load, sounds more like the ignition module than sticking valves to me, but sticking valves also give the same kind symptom of sudden misfire type power loss. worse if it's the exhaust valve.
Do you have excessive oil consumption? excessive tailpipe emissions?
Do you have a filthy carbon-sludged valvetrain?
What is the state of your oil? (lifters blocked?)
Is your static timing set correctly?
Is the power loss sudden or surging or is it just waning and dying?
Do you have excessive valvetrain noise on cold startup in the morning, or does it get noisier with a hot engine?
Roads?.. Where we're going, we don't need roads...
MY92 RRC 3.9 Ardennes Green
MY93 RRC LSE 300tdi/R380/LT230 British Racing Green
MY99 D2 V8 Kinversand
OldBushie
SupporterHow many K's has this engine done?, It sounds like the valves or lifters are playing up on you.
I had the lifters replaced on my 4l V8 at about 250K and it made quite a difference
You only get one shot at life, Aim well
2004 D2 "S" V8 auto, with a few Mods gone
2007 79 Series Landcruiser V8 Ute, With a few Mods.
4.6m Quintrex boat
20' Jayco Expanda caravan gone
Master
Checking timing today. 260000 on engine. I have spare dizzy one has a scorcher amp but not sure how old. Will try another coul and check all connections and look at replacing amp.
Master
Just checked timming and was way over the markings. Brang it back to 10btdc. Test drove and still a bit rough and popping up hills but no rattling/pinging. Will check modukes and connections tomorrow
Master
Also seems to struggle between 2000-3000 rpm get rough and feels like its missing. Feel vibration in cab
LordRover
SupporterBring it back to the standard 3 BTDC and see how you go - if OK then advance until issues start again then back off until OK.
Your 3.9 should be Ok on 91 Ron at 9BTDC
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
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