Main IndexAuto Repair Home Search Posts SEARCH
Who's Online WHO'S
Log in LOG

Search Auto Parts

1993 chevy s 10 4.3 v6

  Email This Post

New User

Feb 18, 2013, 10:40 PM

Post #1 of 5 (2338 views)
post icon 1993 chevy s 10 4.3 v6 Sign In

hey there my 1993 chevy s 10 4.3 liter v 6 is having a few problems.
it sat for five years so i was expecting issues. when i got it it wouldnt start obivously, so far iv replaced the spark plugs the oil filter and oil, the gas and a fuel pump also the egr valve as well as the distributor cap and rotor. it was also missing a 30 fuze( it was a faded identification fuze port but it was clear that a 30 was meant for it.

it starts up and runs strong however its idle is way too high.(please note it has a throttle body not a carb)
while in motion the car pulls itself up to 25-30 mph after about ten minutes it bogs down and dies and refuses to start back up.
it also has a check engine light reading a code fifteen (coolant temperature sensor voltage reading too high) i think it might be the o2 sensor causing the issue or possibly the fact that its just gonna run a lil rough for a lil while then regulate itself off. please help if you can or atleast give me some insight on possibilities

(This post was edited by kaysonecarraher on Feb 18, 2013, 10:53 PM)

Veteran / Moderator
nickwarner profile image

Feb 18, 2013, 10:51 PM

Post #2 of 5 (2329 views)
Re: 1993 chevy s 10 4.3 v6 Sign In

Your vacuum hoses and all the intake gaskets are almost old enough to go into a bar. Change the hoses at least. Why would you suspect an oxygen sensor being bad when a code comes up for a coolant sensor? That is the code that needs the be looked into as it can and will make this run like a bag of crap.

First, get about 5 feet of the top 3 sizes of vacuum hose at your local parts house. Get a fresh razor blade to cut it and change one vac line at a time on this engine. If 4wd remember there is a hose going to a vacuum pod and down to the diff for the 4wd actuation too. Change them all, I don;t give a damn how good they look. Hose is cheap, and old ones are not to be trusted.

After you have done that, you need to look at the wiring plug for the CTS and do some testing on it. Do you have a multimeter?

New User

Feb 18, 2013, 10:57 PM

Post #3 of 5 (2325 views)
Re: 1993 chevy s 10 4.3 v6 Sign In

ah makes sense ill give it a shot and im not too sure what a multi meter is (sorry people have different terms for different things) i have a voltage meter and a ob 1 code reader. and what is the CTS?
again sorry for my incompitance

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 19, 2013, 2:33 AM

Post #4 of 5 (2297 views)
Re: 1993 chevy s 10 4.3 v6 Sign In

CTS I think is yellow and black wire to a sensor for engine coolant near thermostat. You can test it for Ohms at what known temp but as Nick said the plug right there is also a problem spot. That item AKA ECS tells the thing how warm the engine is so it can deliver the correct amount of fuel.

BTW - If this was outdoors for five years without intense storage preparation expect a zillion things to do or will happen/fail soon. Brakes are probably junk no matter how good they were among many things,


Veteran / Moderator
nickwarner profile image

Feb 19, 2013, 6:14 PM

Post #5 of 5 (2263 views)
Re: 1993 chevy s 10 4.3 v6 Sign In

No need to apologize for not knowing something. If you knew it, you wouldn't be here and thats what this place is all about.

CTS means coolant temperature sensor, which tells your computer what temp the engine is at. When the engine is cold, the computer richens the mix with extra fuel by commanding the injectors to stay open longer than they would if the engine were cold. Its the modern day version of a choke and works better than the old carb systems for cold starts. But if the coolant sensor is bad or its connection corroded up the computer is fooled into thinking the engine is still cold, and dumps a rich mix into it that will cause it to bog down and eat fuel badly. Your timing of when this occurs which is about how long it would take to reach operating temp in Tacoma points to it as a possibility. However it can also be caused by other things like a vacuum leak. Many times its not one big leak, just a bunch of smaller ones that have added up. With the age of this you would want to replace all those vacuum hoses as they are cheap and easy to do, and even if not the exact issue at the moment you will save a lot of trouble down the road.

  Email This Post

Feed Button

Search for (options) Privacy Sitemap