93 festiva surges / jerks when driving.

[weside]

so i finally got the motor running sound. i fixed my massive miss aligned front end. so i take it on the street for the first time(in years). i put it in 1st and it takes off slow and normal, then when i let off the clutch it jerks bad and starts to die, does this in second too. i got a new fuel pump but i'm wondering if i got the wrong fuel filter or something else. when its idling its smooth theres a little hesitation when i hit the gas but it goes away the warmer the engine gets. the check engine light is NOT on so no codes to check. i replaced just about everything for a car that been sitting, new fluids,new fuel pump, new spark plugs, wires, dist cap ect. VAF comes to mind, mine seems to be working right, i have another one thats like new but it needs soldering. i do have the haynes manual now but i cant seems to find this issue.

[zoom zoom]

You sure the sock stayed on the new fuel pump? Sounds like its not getting steady fuel when your moving.

[weside]

yeah i was careful putting it in and there a screw that hold the sock on.

[Movin]

Make sure the VAF is not sticky and that the connection from it
to the throttle body is air tight and has no cracks that open
up when the motor rocks.

[cway1319]

U said its been off the road a while? Bad gas? Maybe some "heat" or other treatment

[91mcnasty]

Mine did the same an the carb is bad.

[Flyin4stroke]

No carbs on 93....

[RhodeStiva]

Mine does the same thing only in first gear and if you change gears to early i think ir might be fuel filter. I knocked the guts out of my catalytic convertor and it helped a little there was a clog in it.

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[denguy]

Coil?

[RhodeStiva]

No. coil is good i think the fuel filter.

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[RhodeStiva]

Mine is doin the same been help.

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[FestYboy]

No. coil is good i think the fuel filter.

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fuel filter won't affect a low speed load based hesitation unless it's so clogged that it's affecting rate of flow (unlikely).

[RhodeStiva]

What could it be? any suggestions

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[WmWatt]

So it runs fine idling at high revs? It only misbehaves under load?
You might put the font end up on stands, start the engine, and put it in gear.

[RhodeStiva]

Yes

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