5th Gear Member
Join Date: May 2008
Location: San Francisco, CA
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fuel pump possible... but then if u've never changed fuel filter, then that may be the culprit too.
The only way to check is to check your fuel pump pressure. there is a service port by the fuel rails where u can screw in a guage to measure the pressure.
Then stage 2 of the check is to measure the pressure BEFORE the fuel filter. Same readings as fuel pressure at injection rail port = fuel filter is fine
Higher reading before the filter = time to change filter.
You can use this little trick i use when i diagnose fuel probs for friends:
1) switch on ignition maybe 2-3 times;
*if it starts right up, then u do hv a fuel prob.
** if no change from before, then ur prob is electrical
REASON: everytime you turn the key ON, the injectors will shoot some fuel into the combustion chambers to allow for a cold start.