3400 GM Engine 3.4 Liter Motor Explanation And Discussion




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Elise Kegley: 2004 alero, 3.4 v6 ,i have to pump the gas to start it and it will idle and quit . it also has a funny egg smell to it. i changed the plugs and it didnt help.

Radioactive Gamer: I bought a 2001 buick century with the same engine, and it has a missing manifold hose that I believe is transaxle, where would the other end of the hose have gone to if it were still there? The port is just opened up, and it causes rough idle until I place my finger over it. Can I just plug it? Or does that hose serve an important purpose?

Ediberto Leal: I beleive the 00-05 Chevy Impala base model cars have these engines. :)

gerry kline: what is the name of the line that is in front of the intake the has a fitting screwing into the top of the thernostat housing and goes to the reservoir?

Danny Ritzendollar: my car has a very bad misfire and it makes a loud hissing noise when I Rev the engine I can't find the problem and it's getting worse

mike cunningham: on the dis system u mention a vacuum does that line go to the upper intake right next to the alternator?

CAR MAC 1: dose the culd air intak freak up your car ?

nate grover: My 2004 Grand am has 231,000 on the 3400 engine , and has only needed a power steering pump (although the computer and a few other electronics were repaired becuase the car was struck by lightning after about 2 years of ownership). Does anyone else get an odd shearing sound that oscillates when cold? The sound goes away after a few minutes of running.

kodi guy: no spark

Benjamin Vasquez: THE TRANSMISSION VACUUM IT SHOWS IN THE TO RIGHT FRONT OF THE MONEFOLD''. I'D PLUG IT COS NOT KNOW WHERE TO GO WITH?
IN 2004 3400 GRAN AM..

ben morales: At 2:29 you touched a line but didn't mention the name. I have the same engine but in a Pontiac and I'm looking for that line. I put a rubber cap on it and it stopped the rough idle but did nothing for the acceleration. Please help. Auto places are being jerks.

whitcheywoman: I have a 1998 Venture and the pipe that runs in front of the motor that looks like it goes into the firewall, and has a couple of small hoses in it, what is that called? Mine got a pin hole leak in one of the corners and I had to have it towed because of the leak. Some have said it is the transmission cooler line, but I don't know. I was spraying antifreeze on the motor so I know it has something to do with that. Any help would be appreciated.

Eric Devlin: I've got a 98 skylark fuel line was leaking caught on fire fixed the leak and the wireharnes but won't start can anybody give me advice

Dave Greaves: I have this engine.. a shop did the intake gaskets when they went while i was out of town and could not do it myself.. not sure if my issues is do to how they put it back together or not... on the fuel test port I can't get a tester onto it because there is a pipe just infront of it that hinders screwing on the fitting of the test gauge hose... is there maybe a special adapter like a 90 elbow fitting for that or ?

Ron Gabbard: I got an 03 Venture, front right 3 rocker arms doesn't move. Could this be anything but collapsed lifters?

Dave the IT Guy: I wanted to ask if anyone knows how common EGR code P1404 is on these cars? Is this the code that requires the PCM reprogramming? I had my original EGR valve in the car and the CEL came on. I pulled the P1404 code with my scan tool and it said it was the EGR closed postion problem. I replaced the EGR valve with a new one from Advance Auto (don't remember what brand it was) and cleared the codes. About 10 miles of driving later, the CEL came back on and it's the exact same code. I doubt it's carbon build-up in the intake since the code isn't a flow problem code. I also doubt the EGR valve itself is bad since both the original and new are throwing the exact same error code. Any ideas on this one?

Renownedd One: got a grand am gt 2003 and I have that exact green puddle you speak of!

Matthew Springfield: what is the line coming from the upper intake manifold near the fuel pressure regulator

thatsupramk3guy: I got a 2004 alero with what I think it's a bad transmission. when it gets to 3000 rpm it just lags. the MAF is all clean and the car has no catalytic converter what should i do?

Rob: I've got an '01 Alero with the 3400 in it. Recently it's been running rough when the engine is warmed up and difficult to start. I noticed the is a vacuum port without a hose on it and has some very good suction. If i cover it with my finger the car will stall out. This port is located on top left as you're looking at the motor from the front of the car. If you "45" towards the back left corner from the "3400 SFI" on top of the motor you'll be able to see it. I very briefly saw on yours there looks like there to be a line coming off it. Where does it go?
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3400 GM Engine 3.4 Liter Motor Explanation And Discussion