Engine Problem - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority

red_line-gt · September 6th, 2011, 07:08 PM

506 eclipse gt,lately has been running rather odd.when im going about 60mph or more & step on the throttle the rpm's go back to 4,000 & take a while to get back up to redline.once it hits redline it goes back all the way to 4,000.
i don't have a clue what it might be.if anyone knows what it might be or have experienced this issue before it would really help me.

bullet06 · September 6th, 2011, 07:24 PM

506? You Manuel? Anymore information for us? Cause I have no Idea for what you have a bad sensor maybe.

Sounds like safe mode.

red_line-gt · September 11th, 2011, 03:10 PM

06 my bad, its a 6 speed manual transmission. my check engine light just came on, so i went to autozone to see what trouble shooting codes they come up with was P0304:

-ignition sytem faulty
- fuel system faulty-injectors or pressure
-vacuum leak
-engine mechanical condition

If u know what could be the problem, or heard something similar to what i am experiencing, every little hint will help. dnt really have the time or money to go get it checked by a Mitsubishi authorized dealer.

deprydation · September 11th, 2011, 04:52 PM

Check Vacuum leaks...

If you have a CAI or SRI make sure you double check the intake manifold vacuum source for the stock intake flapper valve thingy is either plugged or connected to a suitable source. That's the most common one I know of.

Clovisman · September 17th, 2011, 04:39 PM

P0304, Cylinder 4 misfire detected, Page 13B-579

If you have a misfire your engine will go into safe-mode, i.e. you'll have a hard time accelerating over 4000 rpm's.

DTC P0304: Cylinder 4 Misfire Detected, Page 13B-579
http://tearstone.com/eclipsefsm/2006...05900C-13B.pdf

Sensor (The sensor below is determined to be normal)
•Camshaft position sensor
•Mass airflow sensor
•Engine coolant temperature sensor
•Intake air temperature sensor
•Barometric pressure sensor
•Throttle position sensor

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are)
•Ignition system related part(s) failed. (fouled plug, bad coil pack, clogged injector, manifold leak, shorted wiring harness from ECU to injector)
•Low compression pressure.
•ECM failed.
•PCM failed.

September 6th, 2011, 07:08 PM	#1 (permalink)
red_line-gt Junior Member Name: James Join Date: Nov 2008 Vehicle: 06 mitsubishi eclipse GT Posts: 13 Rep Power: 4	Engine Problem 506 eclipse gt,lately has been running rather odd.when im going about 60mph or more & step on the throttle the rpm's go back to 4,000 & take a while to get back up to redline.once it hits redline it goes back all the way to 4,000. i don't have a clue what it might be.if anyone knows what it might be or have experienced this issue before it would really help me.

September 6th, 2011, 07:24 PM	#2 (permalink)
bullet06 x-street Name: Matt McAlear Join Date: Dec 2008 Location: Naples, Fl. Vehicle: 06/GT/AT Posts: 1,412 Rep Power: 5	506? You Manuel? Anymore information for us? Cause I have no Idea for what you have a bad sensor maybe. Sounds like safe mode. __________________ BULLET's Modification Link!!! [^](",")[^]

September 17th, 2011, 04:39 PM	#5 (permalink)
Clovisman Senior Member Name: John Join Date: Oct 2008 Location: Clovis, NM Vehicle: 2007 Eclipse GT Posts: 2,045 Rep Power: 6	P0304, Cylinder 4 misfire detected, Page 13B-579 If you have a misfire your engine will go into safe-mode, i.e. you'll have a hard time accelerating over 4000 rpm's. DTC P0304: Cylinder 4 Misfire Detected, Page 13B-579 http://tearstone.com/eclipsefsm/2006...05900C-13B.pdf Sensor (The sensor below is determined to be normal) •Camshaft position sensor •Mass airflow sensor •Engine coolant temperature sensor •Intake air temperature sensor •Barometric pressure sensor •Throttle position sensor TROUBLESHOOTING HINTS (The most likely causes for this code to be set are) •Ignition system related part(s) failed. (fouled plug, bad coil pack, clogged injector, manifold leak, shorted wiring harness from ECU to injector) •Low compression pressure. •ECM failed. •PCM failed. __________________ 2007 Eclipse GT=Sunset=Auto--20% Tint=Injen CAI=RIPP Long Tube Headers (Jet-Hot Coated)=RIPP High Flow Cat=RIPP BRAT Box=Magnaflow Cat Back Exhaust=Energy Motor Mounts=Ingalls Stiffy=Megan Coilover Suspension=Progress Rear Sway Bar=SP Performance Diamond Cut & Slotted Rotors=EBC Yellow Stuff Kevlar Pads=Diamond Lower Grill=Konig Illusion Wheels=BF Goodrich G-Force Super Sport Tires

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		Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority > Performance and Technical > Eclipse Performance
Engine Problem

September 11th, 2011, 03:10 PM	#3 (permalink)
red_line-gt Junior Member Name: James Join Date: Nov 2008 Vehicle: 06 mitsubishi eclipse GT Posts: 13 Rep Power: 4	06 my bad, its a 6 speed manual transmission. my check engine light just came on, so i went to autozone to see what trouble shooting codes they come up with was P0304: -ignition sytem faulty - fuel system faulty-injectors or pressure -vacuum leak -engine mechanical condition If u know what could be the problem, or heard something similar to what i am experiencing, every little hint will help. dnt really have the time or money to go get it checked by a Mitsubishi authorized dealer.

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