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Bad take off and driving

Tiny
KENNETH SARSYCKI
  • MEMBER
  • 1987 CHEVROLET CORVETTE
  • V8
  • 2WD
  • 111,500 MILES
Car starts and idles good but give gas and it falls on its face and sometimes it back fires from intake. If you drive it slowly it will get faster and faster when you get to around fifty mph it well let you give about 3/4 the pedal.
Sunday, May 21st, 2017 AT 1:13 AM

10 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes first then check fuel pressure with a gauge auto parts rent it. It can be either low fuel pressure or an ignition/basic engine problem. Should be 41-47 psi key on only.
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Sunday, May 21st, 2017 AT 8:08 AM
Tiny
KENNETH SARSYCKI
  • MEMBER
  • 8 POSTS
My dash is not working I replaced fuel filter I sent of for fuel and vacuum ga
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Saturday, May 27th, 2017 AT 10:03 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You can probably rent both of those gauges at auto parts also I think if you use a volt meter it will flash volt meter by hooking ot A&B of aldl. You can also check ignition system like ohms on plug wires 5000 per foot and check plugs for junk between electrodes and or black/oily.
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Sunday, May 28th, 2017 AT 7:54 AM
Tiny
KENNETH SARSYCKI
  • MEMBER
  • 8 POSTS
I have volt meter I checked
Vacume new filter pump new checked fuel pressure 38 cleaned maf senser with mafcleaner found 1vacoff I have no dash to get any reading any help after warmed up will idle for about 2-3 min. Thin just tap the gas and will go2-3 min moor when going you give a little gas give some more if you push to mush it fall on face or pop back but as you keep releasing it will go some more and over and over and over again
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Sunday, June 11th, 2017 AT 10:09 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Your fuel pressure is to low for one thing I gave you the readings in my reply and they must meet the minimum number so your pump is probably bad. Try putting volt meter in a&b if the gauge bounces that will do the same thing as dash light for codes. Pressure for fuel is taken with key on only. If you get codes then get back to me with numbers. Also maf is self cleaning so you don't need to do that
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Sunday, June 11th, 2017 AT 11:16 AM
Tiny
KENNETH SARSYCKI
  • MEMBER
  • 8 POSTS
By my auto manual purser 34-39 At schrader valve?
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Sunday, June 11th, 2017 AT 3:15 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It should be 41-47 key on only at Schrader valve on fuel rail
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Sunday, June 11th, 2017 AT 3:20 PM
Tiny
KENNETH SARSYCKI
  • MEMBER
  • 8 POSTS
Why is the manual say34-39?
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Monday, June 12th, 2017 AT 5:14 AM
Tiny
KENNETH SARSYCKI
  • MEMBER
  • 8 POSTS
The pump is new and filter
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Monday, June 12th, 2017 AT 5:16 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try what I said with volt meter to check for codes your positive on volt meter will go into A slot and black into B slot if you get any codes pulled then get back to me with them. Also check resistnance of wires 5000 ohms per foot and check spark plugs for being blackened etc. Finally check compression all around.
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Monday, June 12th, 2017 AT 6:31 AM

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