Engine Performance problem
1993 Mercury Topaz 4 cyl Front Wheel Drive Automatic 170000 miles
The car starts fine runs good up to around 10 minutes then starts going crazy like its not getting gas or spark or air.
I have replaced the coil, distributor complete, mass air flow sensor, spark plugs, fuel filter. All from junk yards except plugs and fuel filter.
When it starts acting up I have to stomp on the gas to get it going then it will clear up and run fine for a bit then goes all to crap again some times when I stomp on the gas it bogs down then it all of a sudden picks up. I am continuously doing this while driving to get to where I am going also I smell a gas smell sometimes and it is getting really bad gas mileage. One other thing I did was beat all the stuff out of the catalytic converter.
Also took aprt EGR and cleaned it it was caked full of black hard stuff in the port going into the EGR cleaned all that.
I am at wits end not being able to figure this out.
I took it to O reillys and used their tester OBGII and it came up and gave these codes.
158 - mass air flow sensor - replaced junk yard
157 - mass air flow sensor
172 and 173 - lack of heated oxygen sensor bank one
186 - injector higher than expected
113 - intake air temperature sensor above average
332 - EGR valve flow insufiecieant
I was told that one of those things are bad and it has a trickle down affect on the other sensors and computer it just freaks out.
I just can't pin point the exact problem
all I can think is that maybe the air flow sensor I got from the salvage yard is bad also.
This is a good little car when running good excellent gas mileage. I use to get around 300 mile per tank fill up. Now I get under 200 miles a tank.
have the same problem?
Monday, August 10th, 2009 AT 1:25 PM