Skip the auto shop - Our mechanics make house calls

Q: When carrying a load, van rough idles and loses power - 2001 GMC Savana 3500

asked by on

There is a low and rough idle in my van and when carrying a load, the van dies and loses power. There are no codes to report. The following have already been replaced, but have not helped the problem: plugs, spark plugs wires, fuel pump, fuel filter, rotor, cap, TPS sensor, idle air control sensor, EGR valve, air filter, and MAF sensor. Why have these replacements not fixed the low/rough idle and loss of power in my van?

A: Hello. There may be an issue with your fuel...

Hello. There may be an issue with your fuel injectors. If the fuel injectors are clogged, this will not usually throw a Check Engine Light code but will prevent the engine from running properly. If a fuel filter becomes overfilled with debris, some of the debris may make it through the fuel filter and may therefore clog the fuel injectors. I would recommend trying to replace the fuel injectors. I would strongly recommend having this service performed by a professional, as some powertrain control module programming may be required after replacing the fuel injectors.

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: AC is not blowing cold and a plastic-like smell when AC is on.

There are different possibilities that could contribute to the plastic smell. The smell could be caused by a coolant leak, an electrical issue, the A/C compressor overheating, or simply an outside smell. Sometimes, plastic bags tend to get stuck...

Q: After brake switch & assembly replacements, brake lights stay on

Hello. This sounds like you may have a short in the wiring that goes to the brake light switch. I would recommend having a qualified professional use a digital multimeter to test the brake switch circuit for excess resistance. If...

Q: Rough idle at stops lights and when parked

This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...