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06-11-2016, 01:09 PM
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#1 |
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Registered User
Join Date: Jun 2016
Location: Austin, TX
Posts: 6
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88 V10 Suburban problems
I have an 88 V10 Sub, Silverado, with the 350 TBI, 700r4 trans. I've already replaced the disributor, rotor, cap, wire, plugs, ECM, fuel pump, fuel relay, starter, battery, cables, radiator, water pump, thermostat. When I drive at highway speeds and slow down it stalls out, then will stall every time I slow down. I've heard of the 700 having a TCC problem, how do I check that? Is there anything else I can check? Pictures help. Thanks.
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06-11-2016, 10:52 PM
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#2 |
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Registered User
Join Date: May 2004
Location: Minnesota
Posts: 4,621
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Re: 88 V10 Suburban problems
Welcome to the board!
If the transmission torque converter was staying locked, it will cause a stall, but not until the vehicle comes to a stop, or nearly stopped. Slowing down, it would not cause the engine to die. It sounds like your vehicle could have an EGR valve that is sticking open. Disconnect and plug the vacuum hose going to the EGR valve and take it on a test drive and see if the problem goes away. Driving without the EGR working will set a trouble code if you drive it long enough that way.
__________________
For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. |
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06-11-2016, 10:58 PM
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#3 |
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Registered User
Join Date: Jun 2016
Location: Austin, TX
Posts: 6
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Re: 88 V10 Suburban problems
What's an EGR? And how do I check it? I'm not a gear head lol, I learn things as they break.
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06-11-2016, 11:31 PM
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#4 |
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Registered User
Join Date: May 2004
Location: Minnesota
Posts: 4,621
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Re: 88 V10 Suburban problems
Photo with identification labels:
http://67-72chevytrucks.com/vboard/s...7&postcount=11 Threads with EGR discussion: http://67-72chevytrucks.com/vboard/s...d.php?t=347247 http://67-72chevytrucks.com/vboard/s...d.php?t=348308 EGR testing write up: http://www.chevytalk.org/fusionbb/sh...php?tid/258416
__________________
For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. Last edited by ChevyTech; 06-11-2016 at 11:36 PM. |
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06-19-2016, 09:31 PM
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#5 |
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Registered User
Join Date: Jun 2016
Location: Austin, TX
Posts: 6
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Re: 88 V10 Suburban problems
I'm replacing my EGR valve, seloniod, and the thermal vacuum switch. My question is on the seloniod the side that connects to the EGR valve is empty, is there anything that is suppose to connect there or do I need to cap it?
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06-20-2016, 08:34 AM
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#6 |
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Registered User
Join Date: Jun 2016
Location: Austin, TX
Posts: 6
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Re: 88 V10 Suburban problems
Sorry I wasn't very clear, the side that connects to the EGR valve has two stems, the bottom one goes to the EGR and the top is just open. Does that top one need capped?
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06-20-2016, 01:54 PM
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#7 |
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Registered User
Join Date: Mar 2012
Location: Little Rock, Arkansas
Posts: 770
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Re: 88 V10 Suburban problems
It's a vent, don't cap it off.
__________________
1979  Sierra Classic Heavy-half1996 Silverado x-cab "the daily" |
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06-20-2016, 10:52 PM
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#8 |
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Registered User
Join Date: May 2004
Location: Minnesota
Posts: 4,621
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Re: 88 V10 Suburban problems
GM-power is correct.
Do not cap the vent port. Make sure you put the hose on the correct port.
__________________
For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. |
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