Pls help! Acceleration problem!

[Jesusv132]

My truck idles revs and runs fine but when i punch the gas it wants to back fire and it doesnt take off it wants to stall? Already changed fuel filter . It never did this until about a week ago . Happens everytime punch the gas it wont take off .

 

[RawbDidIt]

My truck idles revs and runs fine but when i punch the gas it wants to back fire and it doesnt take off it wants to stall? Already changed fuel filter . It never did this until about a week ago . Happens everytime punch the gas it wont take off .

Can you provide further information? Engine size, year of vehicle, other symptoms, past work, etc.

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[Jesusv132]

383 stroker , 95 silverado . Only symptoms its been having that started a week ago

 

[Jesusv132]

Can you provide further information? Engine size, year of vehicle, other symptoms, past work, etc.

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[RawbDidIt]

Backfires point to valves, have you checked timing? Have you done anything to it in the past couple weeks?

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[Jesusv132]

Backfires point to valves, have you checked timing? Have you done anything to it in the past couple weeks?

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Not really back firing but like if it wants to it just holds itself back as soon as i punch the gas and it doesnt take off . This has never happened havent done nothing to it in the past week .

 

[kennythewelder]

383 stroker , 95 silverado . Only symptoms its been having that started a week ago

Is it carbed or FI. A TBI?? Did you check the timming? What distributor are you running? Could be ignition related. Also have you checked your fuel pressure?

 

[Jesusv132]

Is it carbed or FI. A TBI?? Did you check the timming? What distributor are you running? Could be ignition related. Also have you checked your fuel pressure?

Fi, never had a issue with timing havent checked fuel pressure yet but its always ran fine until last weekend it started doing this

 

[RawbDidIt]

Not really back firing but like if it wants to it just holds itself back as soon as i punch the gas and it doesnt take off . This has never happened havent done nothing to it in the past week .

If it's not backfiring, but stumbling, that's more than likely a fuel or air delivery issue. Check fuel pressure and vacuum. If the issue is primarily during heavy acceleration, monitor it during a drive and see what you notice.

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[kennythewelder]

If it's not backfiring, but stumbling, that's more than likely a fuel or air delivery issue. Check fuel pressure and vacuum. If the issue is primarily during heavy acceleration, monitor it during a drive and see what you notice.

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X2. You can use an unlight propane bottle, with the valve cracked open, running this over the intake and vacuum lines with the engine at idle. If theres a leak, the engine will suck in the propane, and the engine will speed up.