Questions & Answers for: fuel injectors 2004 trailblazer

...2004 Trailblazer has 102K miles on it and has been running rough. I have run several tanks of fuel injector cleaner with no help. Changed spark plugs this weekend and found oil in #'s 2, 4, and 6. ...

...first!! After engine is running for 20 sec (while misfiring), pull your #1 sparkplug and check for fuel. If there is no fuel replace the injector!!If there is fuel, post a comment for more

...Changed #1 igination coil module but problem still exists, what do u suggest You might have a fuel injector sticking on that cyl.Try some good fuel injector cleaner in the gas tank that might ...

...Trim System Rich Bank 1Possible causes- Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Faulty Mass Air Flow (MAF) ...

Fuel, air and spark. So if it doesn't start, something's missing. Is your fuel pressure OK? Is your spark present? Is ECM firing injectors? Check all those basics and I'm sure you'll find what's wrong

...But there is no code for a problem best solution first change fuel filter and put some fuel injectors cleaner good one. Check for blocked exhayst system Cat converter failed and blocking ...

...fuel pressure--- faulty injectors---faulty injector wires---HT leads touching each other--Leads ---plugs--- air /fuel mixture wrong from leaks in manifold and dash controls hoses--wiring to the ...

...it's something on the electrical/spark plug side of the equation... Check the resistance of your fuel injectors with a digital multimeter, if one of them is out of spec, then replace that faulty

How is plastic housing above fuel injector rail removed? Very carefully, there should be locks on top of injectors or you can pull injectors and rail all together

trailblazer 4.2l is misfiring cylinder 3 changed spark plugs still missfires now I'm going to change coil pack if this doesn't fix problem what my next step Check the compression on the cylinder, make