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Old 04-18-2018, 08:53 PM   #11
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I am looking for reliable decent gas mileage truck. I plan to put some serious miles on it. I work as a process engineer and the cheaper travel bill is money in my pocket. I really got had on the price on this truck.

The truck has never been in an accident and the wheel alignment is excellent great for high mileage. But when the truck hits that rev limiter on passing gear on the highway its frustrating. When I need to get over or pass someone I need that power for a few seconds.

I did get the A/T ECM but I'm not sure how tell the computer is in drive...
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Old 04-18-2018, 09:00 PM   #12
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Sweet
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Old 04-18-2018, 09:12 PM   #13
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youy ever think that youre out of the power band if you are hitting the revlimiter? most things dont make power much over 7-grand. where are you shifting this thing?
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Old 04-18-2018, 09:24 PM   #14
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I think you have something going on in either the ecu or timing. I haven't heard of anyone having a 4500 rpm rev limiter in the 15yrs I've been on the sites. 2500 for limp mode and think nissan set it in the low 6000.

I also would be concerned about pistons for your build. That is the weakest link in the bottom end of these motors.
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Old 04-18-2018, 09:26 PM   #15
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Im not quite sure with this one. Its still gotta pull its self out of power band. Im used the 1989 300ZX.
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Old 04-18-2018, 10:38 PM   #16
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Alabama don't change a thing, I see you are modifying attachments in the ACP.



Set the max attachment size to 75,000 BYTES

Last edited by jeremyd21; 04-18-2018 at 10:55 PM.
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Old 04-18-2018, 11:40 PM   #17
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Are you going to run an automatic? My truck had the Z24i and an auto and the mileage sucked. My grandfather bought the truck new. I get better mileage with the v8 and auto overdrive in it now...
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Old 04-19-2018, 12:05 AM   #18
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No what we were talking about is that the 5 speed has a rev limiter and the automatic does not. Someone suggested that the ECM on a automatic does not have the rev limiter. The rev limiter on my truck engages at 4500rpm, it will just set there and bounce. Now if your not at wide open throttle it will rev to 6000 actually 5500 is all I need but again at WOT the rev limiter engages.

Ive looked at several long blocks that cost like $1,850 they are only rated to 4500rpm its crazy.

I got a used engine today cost me 300 bucks. The block is painted blue and the head and timing cover aluminum. So I think the engine is in good shape.

here is the thread that started this discussion
http://www.infamousnissan.com/forum/...ad.php?t=41351
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Old 04-20-2018, 09:03 AM   #19
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Quote:
"I got a used engine today cost me 300 bucks. The block is painted blue and the head and timing cover aluminum. So I think the engine is in good shape..."
Old School Guy sez: Look at the exhaust and make sure there is nothing in there that is black, and WET. Black powder, or gray, is okay.

Dump the oil first chance you get while the motor is out, scrape pan, replace gasket. Look at bearings and examine the oil that came out while you're in there. Don't refill until engine is IN, and use Lucas with 3 1/2 quarts additional oil. Keep the extra half quart of oil behind your seat to start campfires.

If everything looks good, this is the time to give the engine a complete cleaning and install new gaskets wherever you can, before installation. I would pop in new freeze plugs and a new rear main seal, a new pilot bearing in the back. Front cover? Pull it now and check water pump, maybe replace it on GP with new front seal. Chain check, tensioner check.

Might as well do it now, while it's easier. I wouldn't touch the intake or exhaust gaskets unless you think it's necessary, but you might want to pull the EGR valve and clean it.

I don't want to go any further than that, because beyond this point there are better experts. But those are tried and true things that any Old School Guy might say.
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Old 04-20-2018, 01:07 PM   #20
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If you can hit RPM below WOT but not at WOT I think you got something else going on there. A rev limiter doesnt care about throttle position, just RPM.
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