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Engine & Drivetrain

Post messages here about engine mechanics, exhaust, intake, etc. Anything to do with the engine system as a whole.

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High hydrocarbons and misfiring

April 7, 2003 by Vodkaboy
2 replies

1.2k views
well, today was the first day i have been able to drive my Z, and it was runing a bit rough. Anyway, when it is cold it misfires quite a bit, but after it warms up, it misfires less it seems. I also took it into DEQ and it failed hydrocarbons by a factor of 3X (OUCH!). this is not a cali Z, and never was equiped with a cat (nor will it ever be equiped with one if i have any say in it). Anyway, i began to figure that it might just be running rediculusly rich after the DEQ results, also causing it not not/misfire when its cold (and as it heats up it gets enough heat to ignite the rich mixture and is happy). Would an overly rich mixture cause these problems? how can i adjus…

Last reply by sjcurtis, April 8, 2003
Ugly Interior 1 2

April 4, 2003 by mmagnus
18 replies

2.4k views
JUST SAW THIS CAR ON EBAY. SOME PEOPLE HAVE NO TASTE. :sick: SORRY

Last reply by Alfadog, April 6, 2003
Distributor position? 1 2

March 2, 2003 by JEFF
14 replies

1.8k views
I recently installed a 1978 (n47) head, fuel injection & electronic ignition on my 240z block (with flat top pistons). Both the engines ran good before the transplant. I can't get the new 'hybred' to fire. Shouldn't the distributor on the 280 be at a the same installation position as the 240 engine?? I am sure the crank/cam timing is correct - set it by the(240z manual) book. I have the injectors working fine - I have excelent spark with new plugs & wires. Doesn't that point the finger at the spark timing - I set that by the book (240z manual) also. Any ideas would be helpful. Thanks guys - Jeff

Last reply by JEFF, April 6, 2003
what to do with the L28block

April 2, 2003 by Znut73
6 replies

1.5k views
:stupid: hey guys wondering what the best setup on the Lmotor is and i hear it is the F54 with P90 head my question is is that motor fuel injected? does it have a turbo? do i have to run the fuel injection and turbo? if thats what it is if i dont how do i go about getting it carberated the reason i ask is that the L24 in my Z is shot the head is allright but the bottom has a couple of cracks that are bad.and i found a Newer Zthat is wrecked and abandoned and the motor is in tacked havent seen the motor yet want to know what to look for. Thanks guys for the help dont know what i would do with out you.

Last reply by Znut73, April 4, 2003
emissions

March 30, 2003 by z_boi
4 replies

1.2k views
hi guys. Well, once again, i have another question. Ok. i want to remove my emission components, but dont really know where everything is located and things like what i need to cap off. can u guys link me to a site or give me instructions and pictures of how to do so. thank you!

Last reply by z_boi, April 4, 2003
Overhaul or rebuild: what's the difference ?

March 31, 2003 by mar2c
4 replies

25.1k views
Before all the flames start coming, let me just start off by saying that I do know what it means to rebuild an engine... My question is more dealing with an engine overhaul. What is typically done to overhaul an engine ? Where do you draw the line between the overhaul or rebuild decision ? As best as we can figure, our '78 sat for 5 years before we bought it back on Aug 2001. When you drive it, you can tell that the car isn't giving you all it has. I plan on replacing the exhaust system soon, but the engine needs some attention as well. How do you determine what would be best? Beside the difference in cost, is there anything that would make one option more attractiv…

Last reply by beandip, April 4, 2003
unsteady idle

April 4, 2003 by z_boi
1 reply

1.1k views
My car doesnt have a very steady idle. Somes times it will idle ok but then most of the time it idles pretty high. I jus recently found a very bad blow by hose and had it replaced. Now its idels jus fine right when i first start the car, then it jus goes up slowly. then for about the rest of the time it idles around 1300-1500rpms I've replace the intake portion that goes after the air flow meter with a good one. Replaced the bad vacuum hoses. but it still idles very unsteadily.can some one please help me out.

Last reply by beandip, April 4, 2003
Under the rocker 1 2

March 30, 2003 by That Ozzy Guy
14 replies

1.8k views
It's Sunday and that usually means play with the car day. Today I took the rocker cover off to inspect the gasket as it was leaking some oil in a couple of corners. First thing I noticed was the bolts were loose (the handiwork of the gasket over time) and thought 'ok, the oil leak could be due to the loose bolts'. Having a look at the gasket reinforced my initial thoughts about the bolts as it was still rubbery and not really worn out besides one corner where there was no leak anyway. After having a good look around and taking some pics I put the rocker back and tightened them a little. I guess I'll know next week (I only drive my car on weekends) if the leak is actua…

Last reply by sjcurtis, April 1, 2003
motor mounts

April 1, 2003 by SCCA_racer
0 replies

1.2k views
Looking into if poly or solid mounts(isolators) are available or useful. Car is a 280Z built for road racing with a mildly modified motor.

Last reply by SCCA_racer, April 1, 2003
Difference between L28 and L28E

March 31, 2003 by MDyer
1 reply

3.7k views
I'm cotemplating dropping an 81 L28E into my 77. What's difference? I plan on modifying/rebuilding the L28E (cam, etc.), and when I'm done, doing the switch. Should I use the ECU from my existing 77, or should the 81 ECU be used?

Last reply by Mr Camouflage, March 31, 2003
Sticky throttle

March 22, 2003 by v12horse
1 reply

1.3k views
I have 72 su's on my 260 and the linkage or the throttle cable (or some other cause that I don't know) seems to be sticking. I am not sure which one, but when ever I am in 1st or 2nd gear the car jumps when I step on the throttle because something is sticking. The only reason I think it might be the linkage on the su is because when the engine is warmed up it is not as sticky. My dad talked to a datsun mechanic and he said that many z's are like this or worse. The way it feels when I drive I know that there has to be some way to fix it. It could be as simple as lubricating the carb linkage or changing the throttle cable, but if you have any ideas or your are experienci…

Last reply by DinoUK, March 29, 2003
thermostat part no.

March 27, 2003 by Doug
0 replies

1.3k views
Hey, can someone post the part number for a thermostat out of a 76 L26 (260Z). Not at home so I don't have my books . Thanks all On another note, yay I'm back. (damn computers)

Last reply by Doug, March 27, 2003