What can cause an emissions failure?
What can cause an emissions failure?
A rich air/fuel mixture will often cause a failed emissions test. This problem is usually a result of a defective oxygen sensor or faulty injectors. So, if you fail emissions, have these components inspected and changed if necessary. You have a loose or leaking gas cap.
When did the Chevrolet Astro minivan come out?
The Astro and Safari were introduced for 1985 as the first minivan from General Motors. While marketed as a response to the first-generation Chrysler minivans, GM adapted a rear-wheel drive layout, sizing the Astro and Safari closely to the short-wheelbase Chevrolet G10 van.
What kind of transmission does a 1993 Astro have?
In 1993, an electronically controlled 4-speed automatic transmission with overdrive became standard as the sole transmission offering. As with many other 1993 model year GM vehicles, Scotchgard fabric protection also became a standard feature on Astro vans equipped with cloth seats.
When did GM stop making the Chevrolet Astro?
In 2003, GM upgraded the chassis of both the Astro and Safari with certain suspension components, larger brakes, and six-lug, 16 inch wheels from the full-size Chevrolet and GMC half-ton pickup trucks. The Chevrolet Astro and GMC Safari twins were originally scheduled to be discontinued after 2002,…
What kind of engine was in a 1985 Astro?
Fig. 4: Vacuum hose routing-1985 with 4.3L carbureted engine (Federal and low altitude) Fig. 5: Vacuum hose routing-1986-88 with 4.3L TBI engine
What can cause an emissions test to fail?
USUAL CAUSEThere are numerous components that if not working properly, can cause high emissions or an emissions test failure. You should read each of the components description and operation in the emission control system section of the manufacturer’s manual covering your vehicle in order to gain a working knowledge of each system.
When to diagnose service engine soon emissions failure?
If the “Service Engine Soon” or “Check Engine” light is on it should be diagnosed prior to any emissions diagnosis. CO Failure is the result of an excessively rich air fuel mixture. The following is a list of the most common causes: HC Failure is the result of incomplete combustion. Any item that causes incomplete combustion can result in high HC.
Can a Honda Civic fail an emissions test?
[…] site that specializes in explaining the way a car runs created the article “DIAGNOSE – EMISSIONS TEST FAILURE (Smog Check failure)” to help explain why a car can fail an emissions test and require emission […] Failed emissions 1994 Honda Civic SI -1.6 ltr. – HELP!!!!! – Honda-Tech says:
Fig. 4: Vacuum hose routing-1985 with 4.3L carbureted engine (Federal and low altitude) Fig. 5: Vacuum hose routing-1986-88 with 4.3L TBI engine
