car blowing smoke only at highway speed


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Tierod end change caused some kind of leak

Hello so I just took my car to the nearb...

2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes

When I bought this car in summer 2023, a...

Grounding Cable, 2017 Jeep Renegade Trailhawk

The Cable that connects my negative batt...

Rough Idle (Found new thing)

Hi everyone. First of all sorry for bad ...

equipment

hey yall. im a first year engineering st...

HELP

I have a 1956 1/2 ton panel truck, 69 35...

Howdy

    Just wanted to s...

ABS/Tractiob/Brake Lights on But No DTCs

Hello all, Recently while driving m...

Chevy strut replacement

I'm trying to get a sensor of some kind ...

2020 suburban new transmission and issues after install

recently had the transmission fail at 11...

car blowing smoke only at highway speed

Sign up here!

Email This Post

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

tatersmash13
New User

Aug 20, 2016, 12:55 AM

Post #1 of 3 (4178 views)

car blowing smoke only at highway speed	Sign In

I have a 1984 Toyota Camry with 2.0 litre 4 cylander automatic 4 speed.
It starts up fine and runs great until i am at highway speeds around 50-55mph and then it starts blowing white smoke but doesnt smoke any other time it still has good acceleration but i noticed that it is idling a lil high and when i first start it up i have to give it a lil gas but when it warms it it idles just a little high but like i said blow no smoke until i hit highway speed than it blows alot of smoke

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 20, 2016, 4:40 AM

Post #2 of 3 (4172 views)

Re: car blowing smoke only at highway speed	Sign In

OK - It's actually so old now I don't know much about this car! It may still use a carburetor and could use a vacuum controlled module for transmission shifting?

First thing is check all fluids to see which is low. White smoke suggests engine coolant but can also mean transmission fluid.

High idle? You have to have already gone thru vacuum hoses and leaks at this age a time to two by now if not all need be known good. If carb - the choke needs to be known working properly and might stay part on which alone would hold idle up and use way too much fuel. Black smoke if totally not working to shut off quickly, not white.

Yes - it would at first blush suggest ready for a head gasket job but check everything.

If you count on a car this old (no problem) you really need to keep up with details. Someone did along the way or it wouldn't be around now,

T

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 20, 2016, 1:27 PM

Post #3 of 3 (4165 views)

Re: car blowing smoke only at highway speed	Sign In

Check inside the valve cover for sludge build up. These engines were pretty notorious for that. The oil won't drain fast enough and the valve cover will fill with oil causing it to suck it in through the valve stems.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Email This Post

Search for (options) Privacy Sitemap