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General Carburetor question


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22 replies to this topic

#1 crazyman03

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Posted 09 August 2011 - 10:14 PM

I have a '87 Mighty max - Nothing special.. 2.0, 3sp Auto, RWD, Zero gonads. It needs a bit of work but for the most part its a pretty neat truck.

My problem is that I'm getting around 19MPG out of the thing. Is this a normal thing for these Carb'd pickups? it seems pretty low for simple 4 banger..

I've also noticed that it is hard to start.. sometimes after 4 or 5 cranks over and over, while pumping - I've tossed it off to the mechanical fuel pump (yea.. its mechanical). I also noticed that while having to pump it, i can really smell the fuel dripping off the engine. Is that why its hard to start because its getting too much fuel? I suck when it comes to carb's.. any help would be awesome.



-Justin

#2 GeneralDisorder

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Posted 16 August 2011 - 03:42 PM

Is it computer controlled? That's in the era of "feedback" computer controlled carbs and Mitsubishi's are notorious for having computer failures. That's the main reason you don't see older mitsubishi's on the road - I haven't seen a Mighty-Max in years and cars don't rust here. Last one I had anything to do with had a bad ECU (of course) and the dealer wanted an unholy sum of money for a replacement.

GD

#3 crazyman03

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Posted 17 August 2011 - 04:10 PM

I'm pretty sure it isn't computer controlled, at least not by much that would make a difference. The CEL doesn't even require much to clear other than a switch on the cluster.. and I believe its not even a true CEL light but a timed service carb light ( or something to that nature) I cant pull any codes from it because, at least i haven't found, there isnt a way to pull 'em. :-/


So I want to say because there isnt a way to pull any codes.. that it isnt ECU controlled.

-Justin

#4 nipper

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Posted 17 August 2011 - 07:42 PM

a 1987 has a computer feedback carb on it.

This is about right as all 4cyl Mitsubishi Mightymax get 18 mpg on the epa website. Remember back then 18mpg was great for a pickup truck.

#5 crazyman03

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Posted 19 August 2011 - 01:06 PM

well that just stinkin' sucks! is there anything i can do to it to maybe get some more *uumph* out of it? aside from dropping a a FI block in it?


-Justin

#6 nipper

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Posted 20 August 2011 - 12:00 AM

A FI block may not help you much either. This is a brick with a small engine not designed for power, but for MPG.

This sounds like your choke needs to be adjusted. Your pumping it may be floding it out trying to make up for a non-functioining choke.

#7 crazyman03

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Posted 20 August 2011 - 10:41 PM

well to me it doesnt seem to even have the "MPG" when its 19 MPG.. I'll have to try and fiddle with the choke and see if that gets me anywhere.

I'm kinda disappointed since its such a small engine that the best i can get out of it is 19. But, it is what it is..


-Justin

#8 Loyale 2.7 Turbo

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Posted 31 August 2011 - 02:11 PM

... is there anything i can do to it to maybe get some more *uumph* out of it? ...


Yes, Swap a Manual Transmission there; Also a Better Carburetor will Help but the Gas Eater is the Automatic Trans for Sure.

Kind Regards.

#9 crazyman03

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Posted 13 September 2011 - 08:25 PM

big problem i'm going to run into there is finding a 5speed that'll fit in there and to put a clutch setup on it. unless the new tranny would have a cable clutch..



-Justin

#10 crazyman03

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Posted 23 September 2011 - 04:23 PM

GAH! of coarse my friend calls me from a "U-Pull-And-Pay" and says he sees a match truck with a 5speed in it.. with a clutch assy! My only problem is no $$ to do it! BLAST!



-Justin

#11 Loyale 2.7 Turbo

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Posted 23 September 2011 - 04:31 PM

It could be an Easy Swap, since I've seen many of those Pick up Trucks, and all of them with Manual Transmissions, so the point to place the Clutch Pedal must be There and the Hardware will fit it Right.

I Believe that those came with Hydraulic Clutch, but I'm not really Sure...

By the Way, those with Manual Trans aren't Gas Hungry...

Good Luck!
Kind Regards.

#12 crazyman03

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Posted 23 September 2011 - 09:49 PM

I doubt if i can be able to get the trans... i dont have the money for that project. My friend said it was a cable clutch so we would've been able to just grab all of that out with the trans.

I wonder if they did a different cab for the man/auto tranny's.. there isnt a cut-out for the gear shift and no opening for a cable for the clutch.. obviously, i could just cut it out. made me wonder...



-Justin

#13 nipper

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Posted 24 September 2011 - 01:19 PM

well to me it doesnt seem to even have the "MPG" when its 19 MPG.. I'll have to try and fiddle with the choke and see if that gets me anywhere.

I'm kinda disappointed since its such a small engine that the best i can get out of it is 19. But, it is what it is..


-Justin


AT the time most pickups were full size and getting 13-15.

#14 Loyale 2.7 Turbo

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Posted 25 September 2011 - 12:07 AM

Here is an interesting comment from the owner of a '87 2.0L Mighty Max with Manual Transmission:

http://www.carsurvey...ighty_max/1987/

A Video of a Mighty Max with a Weber 32/36 Carb!
(You can see a Red Subaru and a Lincoln there too...)



and here's the Mighty Max / D50 Forums:

http://www.maxd50scene.com/

I Hope those can Help with Ideas...

Kind Regards.

#15 crazyman03

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Posted 25 September 2011 - 09:38 AM

Hey thanks JesZek, for that bit of information. I watched the video of the max with a weber carb.. I gotta say, that guy has a bit of a peice of junk. He did have a few nifty things that he added though like the electronic fuel pump, and such. I'll have to add a post of my truck later and show you it.

I was thinking of the electronic fuel pump, simply because it would probably help it start easier. When you leave it for the night and start it.. it takes a couple cranks to get it to catch.

Eventually, if i end up keeping the truck for sure, I'll try and find a 5 speed for it. seems in that guy's video it had a lot more pick up and go than mine does.. which is sad because he said it was slow! hahaha


Thanks!

-Justin

Here is an interesting comment from the owner of a '87 2.0L Mighty Max with Manual Transmission:

http://www.carsurvey...ighty_max/1987/

A Video of a Mighty Max with a Weber 32/36 Carb!
(You can see a Red Subaru and a Lincoln there too...)



and here's the Mighty Max / D50 Forums:

http://www.maxd50scene.com/

I Hope those can Help with Ideas...

Kind Regards.



#16 crazyman03

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Posted 25 September 2011 - 10:17 AM

Here's a video of my truck.. thought i'd share





-Justin

#17 crazyman03

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Posted 25 September 2011 - 11:36 AM

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Sorry for the mess in the truck.. I havent had a chance to really clean it.

On my to-do for the truck is take off whats left of the old window tint off the 1/3 windows in the back - if you look through them all you see is a blur. I'm wanting to put some tint back on it.. but that'll come later.

I was thinking about that electronic fuel pump (before i saw that video) Obviously it might not do much for the overall fuel economy, but might help with the starting the motor.

I'm also planning on removing the "mechanical" fan that i have. I swapped out the clutch fan a while back for the 1:1 spin fan because it was having clutch issues as well as heating up issues. I wanted to make sure that i was getting all the cooling i needed. now I'm sure a good electric fan should do the trick.


I also want to swap out that power inverter for something a bit beefer.. i occasionally do some auto detailing and need power-on demand. sometimes i cant just run an extension cord from a building so its easier to just have the power as a part of my truck. at the moment its 400w (800w max for 30 sec) but it cant even run a vacuum. so that doesnt do me much good. though, i'm really liking the power outlet i put in the back.

-Justin

Edited by crazyman03, 25 September 2011 - 11:38 AM.


#18 crazyman03

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Posted 25 September 2011 - 11:54 AM

Oh yea, i almost forgot some at-work shots of this thing all loaded up :lol:

Posted Image
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-Justin

#19 crazyman03

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Posted 05 October 2011 - 11:36 PM

yea.... that maxd50 site doesn't seem to have much as far as help. Least, not compared to usmb :-/. I still haven't gotten any replies to my intro post. I've replied to a couple threads and started 2. all I've gotten was a .. nope... sorry you are s.o.l. :-S



-Justin

#20 Loyale 2.7 Turbo

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Posted 06 October 2011 - 12:53 PM



Nice pictures of your Mighty Max, lookin' Good!

Could I Ask what is the Meanin' of S.O.L. ? :confused:

in Spanish, Sol means Sun.

and so sorry to read that the Might max forums are Quiet as a Graveyard...


#21 crazyman03

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Posted 06 October 2011 - 01:13 PM

s.o.l. being S*it out of luck.

Eeh, theres a lot of people who mod their cars there but mostly "slamming" them and putting hydrolics on them lol



-Justin

#22 Loyale 2.7 Turbo

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Posted 08 October 2011 - 08:47 PM

Now I Understand S.O.L. :eek:

Did you know that the Mighty Max Never came with that Name to latin America?

it came as "L200" Pickup... and still is sold as L200 but there is a Luxury version called: L 200 Sportero.

I saw one rebagged as Opel Joker in an european magazine, Long time ago...

#23 crazyman03

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Posted 23 January 2012 - 12:17 AM

neat!, do they have a Dodge d50 down there? its pretty much the same thing engine and body.


Today i took out the 1:1 bolt-on radiator fan and put in a electric fan off of a Integra. I put it on a relay and attached it to the "run" position on the key so that when the car is on it'll be on with it and on a switch so i can turn it off if i'm running too cold. I'll try and get some pictures of it tomorrow.



-Justin




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