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Musso 6 cyl revs to 4000 then loses revs then revs up

Fuel pump good map good fuel filter cleaned

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  • Cars & Trucks Master
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Bad ignition module.

Posted on Dec 10, 2014

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I've cleaned the iac valve, changed the map and the spark plugs still get the spudder like its going to cut off . sometime it does. What else could be wrong?


It could have a clogged fuel filter or a failing fuel pump. Contaminated fuel, clogged injectors. Check for vacuum leaks.
Crankshaft position sensor failure is common on the 6 cyl grand cherokees.

Oct 05, 2014 | 1996 Jeep Grand Cherokee

1 Answer

Which End Of Of Fuel Filter Connects To Manuel Pump On 1987 Dodge Dakota 6 cyl 3.9 ?


The filter should have three hoses. There should be an arrow painted on the filter showing the direction of fuel flow.
And you should be able to blow in one end and the air come out the other if direction is correct.
The line to the pump should be on the end without the extra hose.

Mar 13, 2014 | 1987 Dodge Dakota

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92 jeep wrangler 4 cyl 5 speed skipping and bogging down idling rough replaced fuel pump/filter injector o rings fuel pressure regulator timing chain distributor plugs wires map sensor crank sensor idle...


Have you checked the cam sensor? Also does that vehicle have a "throttle position sensor"? Some cars use both MAP and MAF sensors, not sure about your particular vehicle but if it is one of those, cleaning the MAF wouldn't hurt. Good luck.

Jun 28, 2012 | Cars & Trucks

1 Answer

1991 pontiac 6000 6 cyl stalls on acceleration This situation varies, sometimes it stall when your just barely starting to accelerate and other time I can accelerate a lot more with no problem unless I...


Sounds like the engine is starving for fuel - plugged fuel filter, failing fuel pump, malfunctioning fuel regulator, etc. Have the fuel pressure checked.

Jul 03, 2017 | 1991 Pontiac 6000

1 Answer

Fuel Filter for a 2005 Subaru Outback


In 2005 Subaru moved the fuel filters to the fuel tank for both 4-cyl and 6-cyl cars. What is confusing is the statement in the owner's manual about replacement intervals; the statement actually only applies to 4-cyl cars. Even though the filter is mounted in the tank, this is still a replaceable element on 4-cyl, but not on 6-cyl. The 6-cyl filter element is part of the entire fuel pump assembly (a $300 assembly) and is not sold separately. Therefore the 6-cyl filter is intended to be a "lifetime" part, which really means it gets replaced when the fuel pump fails and the entire pump assembly is replaced.

Oct 30, 2009 | 2005 Subaru Outback

2 Answers

1998 gmc 4.3 starts up but loses power 3-5 mins later,will restart and run again for another short time,fuel filter has just been replaced.


Install a pressure gauge, start and run 3-5 minutes and watch the pressure. You should see the pressure maintain as it did when first started. If it begins to drop, the fuel pump has gotten weak and is starting to fail.
Let me know what you find.
Regards.

Mar 05, 2009 | 1998 GMC Sierra

3 Answers

Poor acceleration, poor gas mileage


I have the same problem as talked about above. 2002 Hyundai accent gsi. HORRIBLE gas mileage. I only get about 320 km per full tank. My driving habits are good. i took it to the garage and they put it on the computer and no error codes showed up. Question: Can a MAP sensor be faulty but NOT show up on the computer diagnostic? I had my O2 sensor checked out and my exhaust, and changed the flex pipe. Car runs pretty good just horrible gas mileage and kinda crappy power. Changed fuel and air filter. Cleaned the fuel system entirely ($80 at garage not $4 bottle).

Anyone ever use a resistor in the MAP sensor?

Aug 18, 2008 | 2001 Hyundai Elantra

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