Longer cranking harder starting - Team Camaro Tech
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post #1 of 7 (permalink) Old Sep 28th, 10, 12:52 AM Thread Starter
chuck
 
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Longer cranking harder starting

Just recently my 2001 3.8 camaro has developed a starting problem. It doesnt fire right up like it always has in the past. I've also noticed while going up a couple of hills in every day trip it it will downshift to lower gear & never has in the past.I had it scanned at auto zone & there was nothing on there. I changed plugs about 3000 miles ago . Any suggestions
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post #2 of 7 (permalink) Old Oct 9th, 10, 08:27 AM
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Re: Longer cranking harder starting

Fuel pump. Check the pressure.
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post #3 of 7 (permalink) Old Oct 9th, 10, 09:34 AM
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John
 
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Re: Longer cranking harder starting

Quote:
Originally Posted by deerhunter View Post
Fuel pump. Check the pressure.

Or fuel pressure regulator, also change the fuel filter.
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post #4 of 7 (permalink) Old Oct 9th, 10, 09:52 PM
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Shawn
 
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Re: Longer cranking harder starting

my guess is a dirty fuel filter
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post #5 of 7 (permalink) Old Oct 10th, 10, 04:34 AM
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Steve
 
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Re: Longer cranking harder starting

Fuel pressure should be 48 to 54psi if you decide to check it. There's lots of things that can cause a hard start and poor performance and not set a DTC. From the service manual on hard start condition:



DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.

Preliminary
Perform the Diagnostic System Check - Engine Controls .

Sensor/System
A variety of sensor or physical conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist, perform the following actions:

Compare scan tool data to a known good vehicle or refer to Scan Tool Data List .
Check for a restricted exhaust. Refer to Restricted Exhaust in Engine Exhaust.

Fuel System
A variety of fuel system conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist, perform the following actions:

Refer to Alcohol/Contaminants-in-Fuel Diagnosis
Refer to Fuel System Diagnosis .

Ignition System
A variety of ignition system conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist, perform the following actions.

Refer to Electronic Ignition (EI) System Diagnosis .

Engine Mechanical
A variety of engine mechanical conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist, perform the following actions.

Refer to Engine Compression Test in Engine Mechanical.

If incorrect compression is detected, check the following items:

Carbon Build-Up
Cam Timing
Oil Fouling
Incorrect Parts
Bent Pushrods
Rocker Arms
Valve Springs
Cam Lobes
Intake/Exhaust Manifold Flashing
Head Gaskets

69 Pace Car and 69 Hard top
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post #6 of 7 (permalink) Old Oct 10th, 10, 10:23 PM Thread Starter
chuck
 
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Re: Longer cranking harder starting

Appreciate all your suggestions ,I'm kinda wonderin if catylictic converter might be pluggin off . dont know if its ever had the thing changed , I'll check fuel pressure before i cut into it ,I just changed the fuel filter with the plugs, thank yall
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post #7 of 7 (permalink) Old Oct 11th, 10, 06:49 PM
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Re: Longer cranking harder starting

If you think the cat is clogged, pull the o2 sensors and try to start it.
The hole in the exhaust will allow the exhaust flow an easy escape.
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