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Revving problem engine revs spontaneously then will shutdown obviously from lack of fuel! fuel pump or injector pump?

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  • Garden Master
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Could also be the shut off valve. stops engine if it is dropped or on its upside down. or could just be the fuel filter...

Posted on Jan 10, 2014

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Posted on Jan 02, 2017

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Engine cuts out (sometimes) when accelerating from, eg, a stop street, traffic lights, then will start again straight away


I would suggest a fuel pressure test. It sounds like you may have a clogged fuel filter or a fuel pump that is not maintaining adequate pressure under load. Obviously the fuel filter is the simplest and quickest place to start and might be best to change before doing the pressure test. Good luck.

Nov 07, 2015 | Cars & Trucks

1 Answer

Causes for excessive fuel consumption in caterpillar D398 Engine


V12 twin turbo with 2x 6cylinder injector pumps.

Excessive fuel consumption can be ...
fuel leak on to the ground.. Obvious
fuel leak into sump via fuel pump body... Check sump oil
worn piston rings... Grey Smoke
glazed cylinder walls...smoke
burnt valves... Need compressin test
faulty turbo(s)... Sound, check manifold pressures
blocked exhaust line/muffler... Smoke black
faulty thermostat so motor doesn't get up to temperature, what is motor temperature ? ... Smoke black
lack of oil, wrong grade of oil for temperature
scavenge fuel line from injectors blocked or not returning to tank
faulty injector(s) causing poor fuel spray
faulty injector(s) bleeding fuel into cylinders... Smoke black
faulty injector pump balance
faulty injector pump timing
faulty coupling between injector pumps, even can be one 180deg out of timing
bad diesel fuel

Are there mechanical losses in motor load ? Alternator fault ? or gearbox fault prop fault ?

What is the exhaust colour ? Black or grey ?
What are the inlet manifold pressures ?
Using a thermometer ( IR if available ) what are the cylinder head or exhaust manifold temperatures ? This may isolate problem to one or more cylinders.

If you can supply more information I may be able to help track down the problem.

Tony

Apr 02, 2015 | Caterpillar D398 marine engine - 1200 rpm

1 Answer

Hw can i fix toyota hilux d4d 3000,2006 model cannot rev over 1500 revs


There are alot of factors that could prevent the engine from revving over 1500RPM. Some sensors like the crank angle or cam angle have to be connected in order for the engine to even start, other wiring loom plugs like the turbo controller need to be connected or the car goes into limp mode and it won't rev past a certain point.

Then there are the automatic throttle controller area wiring loom type plugs near the inter cooler, sometimes people forget to put them all back and the engine won't rev high. Making sure the vacuum pipes in this area are all connected properly, one unplugged pipe, no vacuum, the injector pump relies on the vacuum system and if it doesn't work then not enough fuel delivery, engine can't rev high. Also if the fuel rail is leaking or if the fuel filter is clogged then engine won't rev high.

Feb 26, 2015 | 2006 Toyota Hilux 3.0

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My ranger 89 2.3 starts up idels way up then gos dead


Just before a car runs out of gas it will speed up the idle (rev up) backfire and then die. You are probably experiencing a lack of fuel. Put a pressure gauge on the fuel rail that goes to the fuel injectors. It should probably read between 5 and 15 lbs. If the pressure is bad, it could be a fuel pump or clogged fuel filter. Obviously it is cheaper to start by changing the filter. The line could also be clogged. If it has good pressure all the way up to the fuel rail, it could be clogged fuel injectors.

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2 Answers

2000 Pontiac Bonneville SSEi starts and immediately dies; will not run without foot constantly on gas pedal


Well pumping the pedal on a fuel injected car does nothing. If there are no trouble codes stored in the computer, look for excessive fuel from the injectors or the fuel pressure regulator. Or lack of air thru the idle air control valve.

Mar 09, 2014 | 2000 Pontiac Bonneville

1 Answer

NOT REVVING OVER 2500REVS


u have a leak u need to check areas around injectors

Nov 18, 2011 | Cars & Trucks

1 Answer

Hello, I have 2001 Pt Cruiser LE engine Code B 2.4l 206000miles: Problem Is extreme Hesitation, and in Park you can try Rev the engine but stall or kills the rev. PCM code p 0172 hO2 sensor I know, a...


A rich codes is hard to get. Something is restricting the airflow or you have something wrong with the fuel control. Check the air filter and if it is good. I would wonder if you have a leaking fuel injector. Do you know how to do a cylinder drop test? How well does it idle? Does it smell of raw fuel at idle? Is it hard to start after sitting?

Jun 05, 2011 | 2001 Chrysler PT Cruiser

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My grang cherokee2002 us spec, while driving trnz changes fine but when cick down or full excelrate and RPM reaches 4.5 or 5 engine is loosing power and getting noisy and RPM not going more, while gear on...


You are hitting the rev limiter top range, which cuts off your ignition.

I have a 2001 Grand Cherokee and the problem drives me crazy, but it is the way the car is designed- as soon as you hit the rev limit, it shuts down ignition and your jeep will "buck" - a real pain when you are trying to accelerate into traffic!

You have the 4.0L straight six engine, yes?

If so, please take my advice and learn to live with the minor annoyance of the rev limiter- that engine is IMHO the best Chrysler ever made (nearly "bulletproof"!) and it was so reliable you cannot even get it in a jeep now! For decades, that engine was used in welders, tractors, generators...and yes, jeeps... and it is a favorite among mechanics for its durability!

Feb 01, 2011 | 2002 Jeep Grand Cherokee

2 Answers

Engine cuts off


Check the relays. A worn connection could cause this.
The fuel pump relay is often the culprit.
If you try twisting the relays, gently while it's running, or while you try starting it, you may find the problem.
Hope that's it.

Jul 12, 2009 | 1993 Volvo 240

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