2002 4.2 hard to start
luxeryvic
01-15-2011, 12:33 PM
ive got a 2002 f150 4x4 with a 4.2 i have egr insuffient flow code and bank 2 running rich also sometimes i get cylinder 2 misfire and misfire in first thousand revs it sometimes struggles to start but sometimes it starts right up
i took it to a shop and they said it had low fuel pressure so new pump and tank( old one was rusted) its a bit better but still really struggles sometimes
wat else could be causing this i was thinking changing the plugs to help misfire and cleaning the egr ports and then if that doesnt help a new dpfe sensor
could it still be somethin with fuel pressure ? or wat esle can i do to fix the hard starting and engine codes???
i took it to a shop and they said it had low fuel pressure so new pump and tank( old one was rusted) its a bit better but still really struggles sometimes
wat else could be causing this i was thinking changing the plugs to help misfire and cleaning the egr ports and then if that doesnt help a new dpfe sensor
could it still be somethin with fuel pressure ? or wat esle can i do to fix the hard starting and engine codes???
luxeryvic
01-23-2011, 07:10 PM
anythin any suggestions anyone
danielsatur
01-23-2011, 07:17 PM
1)A bad, or dirty MAF sensor is a symptom of a cold hard start.
2) Insuffient flow to EGR, take the throttle body off, clean EGR, and EGR gase passages @ the same time without removing the EGR valve.
2) Insuffient flow to EGR, take the throttle body off, clean EGR, and EGR gase passages @ the same time without removing the EGR valve.
luxeryvic
01-23-2011, 07:51 PM
if the MAF sensor was bad wood i not be getting a code for it? and how wood you clean it?
danielsatur
01-23-2011, 09:08 PM
A MAF sensor only seems to throw a code when it's a hard fault.
1) You can buy CRC MAF sensor cleaner, and a air filter at any local Auto parts store.
2) Clean both the MAF sensor and electrical connector, use a dielectric grease for electrical connection.
3) Roll the spark plug and wire from cylinder 2 to another pos.
4) Reset an clear code.
Notes -
Cylinder 2 is on bank 1 (passenger side)
Bank 2 - Running rich , Suspect upstream H02 sensor
How many miles are on this truck?
If over 120K miles, it's time for a new air filter,fuel filter, plugs, upstream H02 sensors, and probably a new MAF sensor.
Caution - Lets get this problem fixed, befor you damage your catalytic converters.
1) You can buy CRC MAF sensor cleaner, and a air filter at any local Auto parts store.
2) Clean both the MAF sensor and electrical connector, use a dielectric grease for electrical connection.
3) Roll the spark plug and wire from cylinder 2 to another pos.
4) Reset an clear code.
Notes -
Cylinder 2 is on bank 1 (passenger side)
Bank 2 - Running rich , Suspect upstream H02 sensor
How many miles are on this truck?
If over 120K miles, it's time for a new air filter,fuel filter, plugs, upstream H02 sensors, and probably a new MAF sensor.
Caution - Lets get this problem fixed, befor you damage your catalytic converters.
luxeryvic
01-24-2011, 09:19 PM
203000 km on the truck i have replaced all the filters and everything but the plugs when i bought the truck a few months ago
its winter hear and i dont have a heated shop so i was planning on changing the plugs in the spring when it warms up a bit
if plugs do not do it then your saying its the upstream o2 sensor on bank 2
and ill try cleaning the maf sensor before i replace it they are kind of pricy
its winter hear and i dont have a heated shop so i was planning on changing the plugs in the spring when it warms up a bit
if plugs do not do it then your saying its the upstream o2 sensor on bank 2
and ill try cleaning the maf sensor before i replace it they are kind of pricy
luxeryvic
01-28-2011, 05:26 PM
ok so to clean the erg passages what am i supposed to do you said take the throttle body off?
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