old Civic: hesitation "at speed".. Carb?

[ClareQuilty]

My old ~'93 Civic runs fine at idle & low speeds, but driving what I call fast - 50-80 - it has a lot of microscopic hesitations, like the fuel flow is very briefly not making it through the carburetor. I've always seen these kinds of hesitation problems in cars at low speed or idle, never at mid-throttle.

 

Any thoughts on this? The car ran much better when I got it, but the automatic-choke went out a long time ago & I wonder if this could be related.

[JAS21]

Hi CQ ... nice to have you back. I see that you still have that old banger.

 

Now you haven't really given all the info on this problem.

 

Has this new problem just started?

 

Since you last problem/problems has it been okay. Or has this new problem been gradually getting worse.

 

What tyre pressures are you using now?

[ClareQuilty]

The problem, I would say, came on gradually. The car's been quite serviceable since I last mentioned it. I'm thinking this might be a "common problem" recognizable to those out there who've experience with carburetors.

[transam]

An engine/pistons PULLS benzine from the carb, that's it...But a carb must be set up right...Float level is important and a clean fuel filter.......For me I would first look at plugs and distributor...

 

Wish you lived near me.....

[jpinx]

Dirty main jet in Carb.  Remove carb and clean with airline and replace without touching the settings.

[JAS21]

Think it might be a client for Baht and Sold...☺

[ClareQuilty]

49 minutes ago, JAS21 said:

Think it might be a client for Baht and Sold...☺

Why? Because the carb is dirty? I guess it'll just cost a few hundred to fix.

 

Anyway thanks transam, jpinx, h

Jas21, appreciate the advice. I took the car in early this morning, should have it back by 5.

[BKKdreaming]

an old fuel filter may be too clogged to allow the fuel you need for higher speeds , 

same as a fuel pump not pumping out enough volume to keep up with the revs......

 

I have seen this many times.......

[Kwasaki]

2 hours ago, ClareQuilty said:

Why? Because the carb is dirty? I guess it'll just cost a few hundred to fix.

 

Anyway thanks transam, jpinx,

 appreciate the advice. I took the car in early this morning, should have it back by 5.

 

Yeah easy fix, they will check carb, fuel filter, plugs, leads & distributor,  timing & fuel pump no worries.

Let us know what happened bit dull on here these days. 

[transam]

10 minutes ago, Kwasaki said:

 

Yeah easy fix, they will check carb, fuel filter, plugs, leads & distributor,  timing & fuel pump no worries.

Let us know what happened bit dull on here these days. 

They won't let me sing.......

[Kwasaki]

3 minutes ago, transam said:

They won't let me sing.......

 

Dare l say thankyou for small mercies. 

[Don Mega]

Iam with the trannyman, issue sounds spark related to me, not fuel.

[canthai55]

1+ Trans and Don - 90% of fueling issues are not - they are ignition related.

[transam]

1 minute ago, canthai55 said:

1+ Trans and Don - 90% of fueling issues are not - they are ignition related.

[JAS21]

It's 5:15 pm now ...how is the car ...

[ClareQuilty]

On 11/12/2016 at 11:47 AM, Kwasaki said:

 

Yeah easy fix, they will check carb, fuel filter, plugs, leads & distributor,  timing & fuel pump no worries.

Let us know what happened bit dull on here these days. 

Yeah! That's precisely what he did check, and without replacing a single part it now runs fine.. Must've been cleaning the fuel filter (& maybe carb?) that did the trick.

 

300 baht & I just drove the car 2 hours on the highway yesterday, ran great. :)

[ClareQuilty]

On 11/12/2016 at 5:15 PM, JAS21 said:

It's 5:15 pm now ...how is the car ...

Cars going great now after he cleaned fuel filter. Thinking of selling it while it's on the upswing.  Seems a lot of young guys in Thailand are fond of these old early-90s Civic "3-doors".

[JAS21]

So my post #6 was 'spot on' even those the reason might have been 'spot off'  ... TBH probably a good decission ... you still have the other wreck ... yes ?

[JaseTheBass]

4 hours ago, ClareQuilty said:

Cars going great now after he cleaned fuel filter. Thinking of selling it while it's on the upswing.  Seems a lot of young guys in Thailand are fond of these old early-90s Civic "3-doors".

 

Good little cars - often thought of getting one for the missus as the Rengers isn't great around town.