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Trouble Starting After removing and Reinstalling Intake Runners

 
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Old 28 Jan 2019, 07:55 pm
soonercruiser's Avatar
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Red face Trouble Starting After removing and Reinstalling Intake Runners

Just a quick question for those of you who have.

I had taken off my cast aluminum intake runners to media blast, then High Heat Clear.
That required removing all the attached hoses and throttle body.

**Now after reinstalling.....I am having problems getting her started again.
I have reved the intake smany times, replaced plugs and wires, with no problem
WHY NOW?

I did remove and clean the plugs a little carefully with a wire brush.
Since they were almost gapped to .50, I reduced that down to the recommended .40.
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Old 28 Jan 2019, 10:26 pm
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Default Re: Trouble Starting After removing and Reinstalling Intake Runners

Best that I can guess would be to look over everything for the 1,000th time, see if there is any air in the fuel line. Also, keep in mind, you got rid of a lot of carbon in the intake, which very slightly changed the airflow dynamics. The computer may need a little while to re learn and readapt to the changes. Good luck!
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Old 28 Jan 2019, 10:36 pm
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Cool Re: Trouble Starting After removing and Reinstalling Intake Runners

I think that I solved my own problem.
I did get it started.....had to eventually jump with the wifie's car battery.
But, it was running VERY ROUGH and vibrating!

If I changed the gap on the plugs, I should probably have given the computer a chance to adapt, by unplugging the Neg battery terminal for 10 minutes.

OTHERWISE...I pulled the plugs again.
All were wet...so getting gas...but a couple were charred.
**So, I reset the gap back to .45!
Bingo!

Problem solved...test drove to make sure.

Follow up Question: Would this wide gap affect fuel mileage?
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Old 28 Jan 2019, 10:37 pm
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Default Re: Trouble Starting After removing and Reinstalling Intake Runners

Quote:
Originally Posted by Macgyverman1123 View Post
Best that I can guess would be to look over everything for the 1,000th time, see if there is any air in the fuel line. Also, keep in mind, you got rid of a lot of carbon in the intake, which very slightly changed the airflow dynamics. The computer may need a little while to re learn and readapt to the changes. Good luck!
Only media blasted the outside of the runners for "vanity" sake!
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Old 29 Jan 2019, 06:32 am
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Default Re: Trouble Starting After removing and Reinstalling Intake Runners

if you value your pt, I would really really-really, go back in and change those plugs. its bad enough to bend the ground electrode for the gap when they are new. but to do it once, save twice after its been reheated a gazillion times is asking for trouble...they increase from heat and corrosion and the integrity of the alloy changes and gets softer... they do fall off, especially at that crappy weld at the base! ill wire brush a plug on a industrial gas motor if its not firing and needs to get to a job asap, but that's it... other wise, brushing them can create problems.
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Old 29 Jan 2019, 09:54 am
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Default Re: Trouble Starting After removing and Reinstalling Intake Runners

I agree with rambojoe. I'd get a new set of plugs, set the gap at .042 and let er ride.
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Old 29 Jan 2019, 11:06 am
Fk5 Fk5 is offline
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Default Re: Trouble Starting After removing and Reinstalling Intake Runners

I'm with these guys. Plugs are cheap, just change them. FWIW, the gap shouldn't make such a huge difference. I have the aluminum intake too. When I changed my plugs the old ones were over .086. I had to stack feeler gauges to get an estimate. I put the new ones, gapped at around .04 and there was no discernible difference in driveability or fuel economy. I am very consistent in checking my mpg and any change has been under 1 mpg. The oxygenated gas in winter makes a much larger difference.
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