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Ask Doug Your Own Question
Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 8594
Experience:  Mitsubishi employed and Factory trained ASE certified technician
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2002lancer run but will not accelerate

Customer Question

2002lancer run but will not accelerate
Submitted: 2 years ago.
Category: Mitsubishi
Expert:  Doug replied 2 years ago.
What exactly happens when you press on the gas pedal?
For example does it have zero response, does it start driving faster but at a very abnormally low rate? Or does the engine bog down like it is being choked, etc?
Customer: replied 2 years ago.
Bog down like it id being choked
Expert:  Doug replied 2 years ago.
What is the current mileage on the car?
Is the Service Engine Soon light on?
Does this occur in Reverse as well as Drive? How about Park?
Customer: replied 2 years ago.
Looks like some one put a new head on it i just brought it as is
Expert:  Doug replied 2 years ago.
Thanks, ***** ***** be pretty telling in itself.
Are you comfortable with some minor disassembly to check the belt timing?
Customer: replied 2 years ago.
Yes been working on my cars for 44yearsi
Customer: replied 2 years ago.
Can timing be out 180
Expert:  Doug replied 2 years ago.
Not on this vehicle, as the ignition timing is fixed to belt rotation.
Please take the upper timing cover off, it is held on with four bolts, 10mm and 12mm then it just lifts off.
Then take a 22mm socket or half inch ratchet and reach through the passenger wheel well to the crank bolt. Rotate the crank clockwise by hand until the notch on the face of the cam gear aligns to the arrow on the cylinder head (at roughly 10 oclock, near the corner where the valve cover meets the head).
With the cam gear aligned, take a look down the front of the engine and see where the mark on the crank pulley aligns on the plastic timing scale (it will read 20-10-T or similar).
Customer: replied 2 years ago.
Thanks iwii look at it next weekend my no is 706 -469 9430 jeff
Expert:  Doug replied 2 years ago.
No problem Jeff.
CHeck that out and obviously if it is out time, correct the belt alignment. If it is lined up, then you will want to take a compression test to check the internal health of the engine.
To have this sort of behavior, belt alignment and compression are the first things that come to mind, and considering a recent cylinder head replacement then selling the vehicle, they are all the more likely.
If everything checks out then proceed with your typical inspections (fuel pressure and quality, etc). If it gets to that point we can regroup next week of course.
Good luck!