brake was tight and tried to drive but was hard to move and then engine had cylinder 3 misfire detected took plugs out turned it over and fuel shooting out of that cylinder even after changing injector ,what else can i try?p0303 code
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1999 Pontiac Grand Am Question: to much fuel entering one cylinder changed injector but no change
pushrod April 25, 2013, 00:42Master
Sure it is FUEL"shooting out" of # 3 cyl? Check it again with fuel pump fuse pulled see if fluid still comes out of 3. Sure sounds like a head gasket/head problem and coolant is what you are seeing.
UNLESS vacuum circuit for fuel pressure regulator goes to 3 then possible reg. defective. Test for fuel in vac. hose going to regulator.
Test for fuel pressure bleed off. Pressure test cooling system!
Replyjhk, April 25, 2013, 20:53Rookie
yes it is fuel, replaced fuel pressure regulator, got same result ,disconnected injector wire and no fuel came out cylinder,could it be the ecm ?
Replypushrod, April 25, 2013, 21:50Master
Circuit from ecm to injector needs to be checked but i bet the computer is the culprit! Injector can not be pulsing but being held open. Driver circuit falt. What codes do you have now?
Replyjhk, April 26, 2013, 20:49Rookie
i would like to try and replace the ecm but can i get a new one and just put it in or does the ecm have to be programmed ?
Replypushrod, April 26, 2013, 20:56Master
Yes it has to be flashed but you can get it already done by calling NAPA with the info from the original one.
Replyjhk, April 27, 2013, 22:17Rookie
how do i get the info off the original? by numbers on it or by use of a scan tool?
Replypushrod, April 27, 2013, 22:24Master
These #'s are on the unit, it will have to be removed to see them.
Answer #2goodguy April 25, 2013, 01:27Master
I agree with wetry
AGREE WITH WETRY