Skip the auto shop - Our mechanics make house calls

Q: Engine

asked by on

I have a 1997 GMC Yukon. We swapped the motor 5.7 Liter Vortec, with the same exact motor out of a 1999 Suburban.. Ever since it has been running horrible.. It has new plugs, wires, distributed cap and rotor, new fuel pump.

My car has 200000 miles.
My car has an automatic transmission.

A: The running rough may have something to do ...

The running rough may have something to do with the two different years of the engines but only a computer scan and fuel pressure test would be able tell. Have a certified mechanic, like one from YourMechanic, diagnose the car’s rough running symptoms to see if the problem can be figured out. Good luck.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel light flashes, check engine light on

Hi there, thanks for writing in about your 1997 Mercedes-Benz S420. The fuel light circuit receives information from the fuel level sending unit to show the approximate fuel level and give a warning as the level becomes low. There can...

Q: cracked oil pan

Hello. It is possible that the service shop doesn’t know exactly what is leaking or where the leak is coming from. When there is a leak that is hard to detect, sometimes a technician will introduce dye into the oil,...

Q: 1998 Nissan Cube (Japan) drive belt part number

The Nissan Cube was not sold in America until 2009. This model was a third generation compared to Japan's 1998 version which was the first generation. You may have to call the dealer or a local parts store to see...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.