Author Topic: newb needs direction  (Read 3386 times)

Offline DnSherrill

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newb needs direction
« on: September 10, 2018, 12:46:37 PM »
1986 C10 5.0L with ESC; all original with rebuilt quadrajet pn 17085226;
recently pulled off  the intake to do some general cleaning and replace gaskets. I'd also like to eliminate the charcoal cannister and smog pump and as many vac lines as I can; vehicle is subject to safety inspections only;
I bought a used alum intake, oem pn 14057053, off a Z28 or Corvette, to replace original steel IM
How much else do I need to replace in this project? go to a HEI vac assisted distributor and a different carb? I haven't checked if my vehicle has an ECM
this is not a performance build; primarily just want to clean up the engine bay
I'm sure there's plenty of write ups on this already, I'm searching for one that applies directly
1986 C10 5L LWB

Online Rapid Roy

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Re: newb needs direction
« Reply #1 on: September 10, 2018, 01:38:41 PM »
Welcome
1974 Cheyenne 10 LWB 350/TH350/AC/4 BBL Quadrajet
Mopar by Birth
Chevy by Choice

Offline DnSherrill

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Re: newb needs direction
« Reply #2 on: September 10, 2018, 02:31:16 PM »
after just a little bit of research, it looks like eliminating emissions controls, including secondary air pump, just for the sake of cleaning up the engine bay,  would be too much $ for not enough bang
1986 C10 5L LWB

Offline DnSherrill

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Re: newb needs direction
« Reply #3 on: September 10, 2018, 09:08:04 PM »
my carb is a Qjet 17085226, type R4-M4MED.......
this is my distributor...is it HEI? CCC or non CCC?
I always thought my truck has ESC, maybe I'm wrong on that
« Last Edit: September 10, 2018, 09:13:56 PM by DnSherrill »
1986 C10 5L LWB

Offline VileZambonie

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Re: newb needs direction
« Reply #4 on: September 11, 2018, 09:05:15 AM »
Judging by the wiring there, it looks like someone attempted a bypass and subsequently pinched the wires under the cap. Now's a good time to replace it with a vacuum advance HEI or better. As far as the carburetor goes, unless you plan to keep all of the emissions controls in tact, an upgrade would be in order.
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Offline DnSherrill

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Re: newb needs direction
« Reply #5 on: September 11, 2018, 10:52:38 AM »
thanks
I checked resistance on those pinched wires.....there's good continuity now, less than 1 ohm on each. The truck runs smooth now, the quad was installed as rebuilt less than 50k miles ago and still starts and idles fine. on this distributor the vac assistance was not connected when i pulled off the intake; I haven't located an ESC module on the firewall. Ideally, I'd remove emissions components without replacing a well functioning carb and ignition system
btw, vin 1GCEC14H7GF301875
« Last Edit: September 11, 2018, 01:09:17 PM by DnSherrill »
1986 C10 5L LWB

Offline DnSherrill

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1986 ECM?
« Reply #6 on: September 11, 2018, 03:56:10 PM »
did some or all 1986 C10s have ECMs?
1986 C10 5L LWB

Offline VileZambonie

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Re: newb needs direction
« Reply #7 on: September 12, 2018, 05:45:21 PM »
Okay so your post is confusing and contradictory to me, here is what I get from what you are posting:

You say it's all original but obviously not all original and you want to eliminate anything emissions related that doesn't negate passing a safety inspection although I am not clear why you want to do this since you say it runs just fine and performs as you like. So what exactly is your end goal? To give direction I would say this, pick a goal and work towards that goal, you seem torn between staying stock, not spending a lot of money and wanting outside direction but again, what direction do you want to go?

Based on the components you say you have, yes you have an ECM.
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Offline DnSherrill

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Re: newb needs direction
« Reply #8 on: September 13, 2018, 06:50:55 AM »
sorry to be all over the place.......
I've had this truck since 2002, but currently drive it on average 15 miles/month...probably 2k miles over the last 5 years
carb is not original, radiator replaced, beyond that all original as far as I know.
ECM? I noticed last night there is no o2 sensor, nor has one been plugged.
well, I started out wanting to resolve oil leak(s) and resolve coolant loss (radiator has been replaced less than 10k miles ago and I see no coolant on the ground) it starts fine, and runs smooth with smooth idle, coolant is bright green and oil looks normal......Replacing head gaskets is not an option currently, I'm thinking I'd need to remove the engine for that project.
 regrettably I neglected to test coolant system pressure or check compression before removing intake manifold. 
so, for now, the goal is fix oil leaks and stop coolant loss, I'd like to delete useless vac tubes and emissions components.
1986 C10 5L LWB

Offline VileZambonie

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Re: newb needs direction
« Reply #9 on: September 13, 2018, 08:17:05 AM »
That's a nice truck and from what it sounds like to me, you should keep it stock. See the attached image
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Offline DnSherrill

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Re: newb needs direction
« Reply #10 on: September 13, 2018, 09:05:18 AM »
Thanks, I had it repainted (from navy/gray) in 2006.
What's the argument for leaving it stock? More valuable at resale?
Ultimately I'd like to build a 350 to put in

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1986 C10 5L LWB

Offline DnSherrill

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Re: newb needs direction
« Reply #11 on: September 13, 2018, 05:13:03 PM »
I got a new to me aluminum Z28 intake. There's substantial corrosion around the front right coolant port. Should I try building this up with JB Weld and using it? Or return to sender?

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1986 C10 5L LWB

Offline Irish_Alley

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Re: newb needs direction
« Reply #12 on: September 13, 2018, 05:36:49 PM »
i wouldnt use JB on that. if anything i would TIG it up. if thats not an option then ship it back
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Offline DnSherrill

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Re: newb needs direction
« Reply #13 on: September 13, 2018, 05:38:28 PM »
Thanks for the input

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Offline DnSherrill

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Re: newb needs direction
« Reply #14 on: September 20, 2018, 06:03:34 AM »
I'm assuming this 1st picture is the TCC vac sw at the passenger firewall for the 700R4 converter lock up. It can be tied directly to the carb for ported vac?
The second photo is also a vacuum/electrical union, on the passenger side of the distributor. It looks like those wires go into a loom and eventually to the driver's side of trans tail, and the vac hoses came from a TVS. I'm unclear on what this one is. Possible EGR bleed solenoid? Which can be capped off as the EGR is  being deleted.
The third picture is a duplicate of the diagram on my core support.
at the top left of the diagram the label is illegible but should read: 'TIP IN VAC SW'
Thanks in advance .

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« Last Edit: September 20, 2018, 06:19:16 AM by DnSherrill »
1986 C10 5L LWB