Top Speed

The place to discuss problems and routine maintenance questions and tips that are NOT specifically diesel-related.
User avatar
puttputtinpup
Regular Member
Posts: 10458
Joined: Sat Oct 08, 2005 5:18 am
Location: Winston Salem, NC

Re: Top Speed

Postby puttputtinpup » Wed Dec 12, 2018 6:28 am

The valves are adjusted to spec, right? Valves floating? Check for vacuum leaks? Double check jets in carb and be sure they aren't partially clogged? Fuel pump not delivering enough? When it hits you max speed, does it just bogg down? Begin to miss? Or just won't go any faster?

If the clutch were slipping, you'd likely smell it.

Darby
Regular Member
Posts: 391
Joined: Tue Jun 19, 2012 5:36 pm
Location: Tampa Florida

Re: Top Speed

Postby Darby » Wed Dec 12, 2018 4:14 pm

ScottAHaynesJr wrote:Still in the process of figuring out how to get a tachometer on there so as of right now I dont know exactly what the rpm is. I know it not redlining though because the motor isnt screaming at me like it will through 1-4 if I push it


This splice is the wire that I connect my hand held tach/dwell meter to.
IMG_1290.JPG
Original owner of a 1993 Isuzu pick up, 2.3 engine, 5 speed with power steering and air conditioning. All original except the radio (still have factory radio).
It's cheaper to fix what you have than to buy someone else's problems.

Darby
Regular Member
Posts: 391
Joined: Tue Jun 19, 2012 5:36 pm
Location: Tampa Florida

Re: Top Speed

Postby Darby » Wed Dec 12, 2018 4:21 pm

JoeIsuzu wrote:Whaaaat? Then this is NOT a gear ratio issue. You should be able to redline the engine in 4th. If you're bogged down at 60 in 4th, something is wrong with the engine performance. I suspect with standard tires, you should be able to go at least 75 in 4th, and limited only by engine RPM.

Jack


Mine easily runs up to 75 in 4th. Never pushed it past there but I feel sure it would do more.
Original owner of a 1993 Isuzu pick up, 2.3 engine, 5 speed with power steering and air conditioning. All original except the radio (still have factory radio).
It's cheaper to fix what you have than to buy someone else's problems.

ScottAHaynesJr
Regular Member
Posts: 11
Joined: Mon Dec 10, 2018 10:15 pm
Location: Louisiana
Isuzu vehicle(s): 1990 isuzu pickup 5 speed 2.3

Re: Top Speed

Postby ScottAHaynesJr » Mon Dec 31, 2018 4:02 pm

So I finally got around to messing with the truck again and realised there was a bolt behind the gas pedal that was screwed into the firewall keeping me from being able to open up the second barrel, thus being the reason for loss of power and speed. Now this little truck screams

User avatar
puttputtinpup
Regular Member
Posts: 10458
Joined: Sat Oct 08, 2005 5:18 am
Location: Winston Salem, NC

Re: Top Speed

Postby puttputtinpup » Mon Dec 31, 2018 9:51 pm

Well I'll be! Who would have thunk

ScottAHaynesJr
Regular Member
Posts: 11
Joined: Mon Dec 10, 2018 10:15 pm
Location: Louisiana
Isuzu vehicle(s): 1990 isuzu pickup 5 speed 2.3

Re: Top Speed

Postby ScottAHaynesJr » Mon Dec 31, 2018 10:30 pm

Yep, got me too. But I just want to say thanks everyone for any input you had. Even though none of the issues brought up were the problem, I went through them all and now am more confident that this truck is sound now. So once again, thank you

Red Truck
Regular Member
Posts: 66
Joined: Wed Sep 18, 2013 7:10 pm
Location: Vader, WA

Re: Top Speed

Postby Red Truck » Mon Dec 31, 2018 11:45 pm

Reminds me of the time long ago when I fixed my slipping clutch problem by pulling out the bunched-up floor mat from behind the pedal!! Hah!
'87 Isuzu pickup 2.3 gas, 5spd, 4WD

User avatar
Halden
Regular Member
Posts: 2737
Joined: Thu Mar 29, 2012 5:20 pm
Location: Everertt, WA
Isuzu vehicle(s): 1983 Diesel LS Long Bed 4x4

Re: Top Speed

Postby Halden » Tue Jan 01, 2019 10:06 am

Where I work, a bus supposedly wasn't able to communicate with the accelerator pedal... So they towed the bus back... Just the connector at the pedal had come loos :oops:
It's not pronounced "Ih-soo-zoo", it's pronounced "It-screws-you"
83 LS Long Bed Diesel
64 Chevy C20 w/ 283 & 4 speed.
05 Sonata with a standard
At work: 2000 Blue Bird TC2000 w/ 5.9

ScottAHaynesJr
Regular Member
Posts: 11
Joined: Mon Dec 10, 2018 10:15 pm
Location: Louisiana
Isuzu vehicle(s): 1990 isuzu pickup 5 speed 2.3

Re: Top Speed

Postby ScottAHaynesJr » Tue Jan 01, 2019 6:43 pm

It makes me feel better knowing I'm not the only one overlooking something as simple as what it was