high rpm on highway

**yodapower89** · 02-07-2007, 08:34 PM

Need help, can anybody tell me why my 94 toyota pickup sr5 4x4 tacks at 3000 rpms at 70 miles an hour on interstate.. Any suggestions...

**munkyfu** · 01-20-2008, 01:56 AM

get bigger tires, or change the final drive in your tranny?

**dirtydeeds** · 11-02-2010, 12:35 PM

modern fuel injected engines aren't as influenced by higher rpm's as their older carbuerated ancestors. Especially a 4 cylinder. 3000 rpm is likely close to the peak volumetric efficiency of the engine.

**MuddyTacoma** · 07-05-2011, 04:42 PM

Did you get this worked out? It's a '94 Toyota Truck so it's a bit out of what I'm used to these days, but someone might be able to jump in.

**Dadstruck** · 07-10-2011, 09:56 AM

did you figure this out? I'd like to know too

**GearHead** · 10-08-2011, 01:52 PM

Originally Posted by dirtydeeds

modern fuel injected engines aren't as influenced by higher rpm's as their older carbuerated ancestors. Especially a 4 cylinder. 3000 rpm is likely close to the peak volumetric efficiency of the engine.

Yeah, seems like the OP shouldn't be worried about this. Could always install larger tires I suppose though.

Originally Posted by Dadstruck

did you figure this out? I'd like to know too

See the above quote, it isn't really that surprising that a '94 SR5 would run at 3K rpm on the highway at 70.