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Hard start, idle poorly

Tiny
ASTRATTON27
  • MEMBER
  • 1991 CHEVROLET CAMARO
  • 80,000 MILES
Camaro with 305 engine.
have to push gas pedal to get to start. Have to do this a couple of times. Parts replaced:
plugs, wires, cap and rotor, map, iac, tps, temp sensor, egr, injectors, fuel pump, fuel filter, pressure reg, intake gasket. Any ideas?
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Wednesday, May 29th, 2013 AT 8:51 AM

12 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure first should be41-47 psi and hold for at least 5 minutes then scan for codes and quit replacing parts to fix it it just costs you money, more thatn you would to have it diagnosed correctly
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Wednesday, May 29th, 2013 AT 9:03 AM
Tiny
ASTRATTON27
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  • 7 POSTS
I will check the fuel pressure. I wasn't replacing the parts to fix the problem It's a project car that I'm fixing up and I wanted all new parts. If the full pressure is in spec. Any other suggestions?
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Wednesday, May 29th, 2013 AT 9:20 AM
Tiny
ASTRATTON27
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  • 7 POSTS
Forgot to mention that it's a tbi motor
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Wednesday, May 29th, 2013 AT 9:27 AM
Tiny
HMAC300
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  • 48,601 POSTS
If it's tbi fuelpressure is 9-11 psi
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Wednesday, May 29th, 2013 AT 9:47 AM
Tiny
ASTRATTON27
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  • 7 POSTS
Ok.I put a gauge on the fuel line and got 32-40 psi when the pump primes.
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Wednesday, May 29th, 2013 AT 9:55 AM
Tiny
HMAC300
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Send me the vin code it shouldn't be that high and I think you are confused as to what injection system is that you have. If it's 32-40 for port fuel it'snot enough it shold be 41-47. Port fuel wil have like 4pipes perside
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+1
Wednesday, May 29th, 2013 AT 11:23 AM
Tiny
ASTRATTON27
  • MEMBER
  • 7 POSTS
It's tbi. I know what port fuel injection is. I wish I had mpi injection. I ordered the fuel pump off of ebay and i'm thinking now that they sent me the wrong pump. I just rebuilt the tbi with new injectors and pressure reg. One of the injectors o ring isn't holding the pressure and is leaking past the o ring. The engine is runing rich and has the smelly white smoke coming from the tail pipe. This was happing before the tbi rebuild. Some how the injectors was holding the pressure before, but not now.
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Wednesday, May 29th, 2013 AT 12:14 PM
Tiny
HMAC300
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It should only have 9-13 psi that may be why your oring is leaking. Hopefully it's not damaged your regulator either. And giving you your problem with running as well
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Wednesday, May 29th, 2013 AT 12:16 PM
Tiny
ASTRATTON27
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  • 7 POSTS
Just contacted the seller on ebay from where I got the fule pump. He told me that the pump is rated at 95 psi.
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Thursday, May 30th, 2013 AT 12:02 PM
Tiny
HMAC300
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Just get the right pump before you ruin your tbi unit. Go to anauto parts store. Those rated at 95 psi are way to high I have no other suggestions for you.
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Thursday, May 30th, 2013 AT 12:04 PM
Tiny
ASTRATTON27
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  • 7 POSTS
I will. Last question. Will the high fuel pressure cause the having to push on the gas pedal to start, poor idle and the white smelly smoke from the tail pipe.
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Thursday, May 30th, 2013 AT 12:08 PM
Tiny
HMAC300
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Read previous replies I said it would
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Thursday, May 30th, 2013 AT 12:09 PM

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