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Lack of power. Power cuts out at intermitent times, mostly when hot day and long distances perhaps with high altitude

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Running your ac, hot days, climbing mountan sides cause more strain on the engine therefore kicking on the fan. it will cause you to loose power. That's not a problem it's common in all vehicles.

Posted on Nov 17, 2008

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on Dec 20, 2016 | Cars & Trucks

1 Answer

It has no power an trouble going in to 2nd or 3 gear, I changed egr valve an throttle sensor.

as far as a lack of power, a stopped up catalytic converter will cause you to lose power. the gear shifting problem could very well be that you need more transmission fluid in it, if it is an automatic transmission. perhaps you just need to change the fluid. most of the time I'll start with the least expensive things to fix first.

Mar 25, 2015 | 2006 Dodge Grand Caravan

1 Answer

2001 pontiac grand prix, replaced blower motor, would only work on high, most of the time, at times it wouldn't work at all and when it did on high only. so I also replaced the resistor. I still only have...

Check for power at the HVAC CNTRL fuse with the blower set at any speed less than high speed. There should be power anytime the key is in the run position. If there is no power turn off the blower. If there is power with the blower off you need an ignition switch. The ignition switch is what supplies power to the lower speeds.

Dec 13, 2010 | 2001 Pontiac Grand Prix

2 Answers

What grade gas should be used ?

You should always use premium fuel on the high conmpression V8 engine. Cheaper fuel can cause a PING, and possible engine damage. 87 octane is definitely not recommended at any time, but sometimes you can get by with 89 for a small period of time.

Gas mileage and power will both be down with lower octane fuel, so do not use it all the time.

Jul 26, 2010 | 2005 Lexus Ls 430

1 Answer

Check gage light goes on intermitantly along with the temperature going to hot. At the same time the engine sounds like I turned the ac on. I also notice a loss of power. Any ideas???

The "check gage" when ever the engine coolant is high or the engine oil pressure is low. First step of diagnosis, check the coolant level and your oil level immediately and then go from there. Hopefully, this will help you to FixYa problem!

May 20, 2010 | 2004 Ford F250

1 Answer

My 97 mercury cougar xr7 is burning way too rich and is idleing rough.what can i do

Get a PCM test for fault codes. It could be an oxygen sensor or MAF sensor. Free test at AUtozone if check engine light is on.
Clean MAF sensor heated wires with carb cleaner by spraying seveal times. Do not brush it. Disconnect battery for 2 hours and then drive for 10 miles after hook up.

SERVICE TIP MASS AIR FLOW (MAF) DISCUSSION MAF sensors can get contaminated from a variety of sources: dirt, oil, silicon, spider webs, potting compound from the sensor itself, etc. When a MAF sensor gets contaminated, it skews the transfer function such that the sensor over-estimates air flow at idle (causes the fuel system to go rich) and under-estimates air flow at high air flows (causes fuel system to go lean). This means Long Term Fuel Trims will learn lean (negative) corrections at idle and learn rich (positive) corrections at higher air flows. If vehicle is driven at Wide Open Throttle (WOT) or high loads, the fuel system normally goes open loop rich to provide maximum power. If the MAF sensor is contaminated, the fuel system will actually be lean because of under-estimated air flow. During open loop fuel operation, the vehicle applies Long Term Fuel Trim corrections that have been learned during closed loop operation. These corrections are often lean corrections learned at lower air flows. This combination of under-estimated air flow and lean fuel trim corrections can result in spark knock/detonation and lack of power concerns at WOT and high loads. One of the indicators for diagnosing this condition is barometric pressure. Barometric pressure (BARO) is inferred by the Powertrain Control Module (PCM) software at part throttle and WOT (there is no actual BARO sensor on MAF-equipped vehicles, except for the 3.8L Supercharged engine). At high air flows, a contaminated MAF sensor will under-estimate air flow coming into the engine, hence the PCM infers that the vehicle is operating at a higher altitude. The BARO reading is stored in Keep Alive Memory (KAM) after it is updated. Other indicators are Long Term Fuel Trim and MAF voltage at idle. NOTE: THE FOLLOWING PROCEDURE MAY ALSO BE USED TO DIAGNOSE VEHICLES THAT DO NOT HAVE FUEL SYSTEM/HO2S SENSOR DTCs. Symptoms
  • Lack of Power
  • Spark Knock/Detonation
  • Buck/****
  • Hesitation/Surge on Acceleration
  • Malfunction Indicator Lamp (MIL) Illuminated - DTCs P0171, P0172, P0174, P0175 may be stored in memory
  • P0171, P0174 (Fuel system lean, Bank 1 or 2)
  • P0172, P0175 (Fuel system rich, Bank 1 or 2)
  • P1130, P1131, P1132, (HO2S11 lack of switching, Bank 1)
  • P1150, P1151, P1152, (HO2S21 lack of switching, Bank 2)
  • 181, 189 (Fuel system lean, Bank 1 or 2)
  • 179, 188 (Fuel system rich, Bank 1 or 2)
  • 171, 172, 173 (HO2S11 lack of switching, Bank 1)
  • 175, 176, 177 (HO2S21 lack of switching, Bank 2)
  • 184, 185 (MAF higher/lower than expected)
  • 186, 187 (Injector pulse width higher/lower than expected)
  1. Look at the BARO PID. Refer to the Barometric Pressure Reference Chart in this article. At sea level, BARO should read about 159 Hz (29.91 in. Hg). As a reference, Denver, Colorado at 1524 meters (5000 ft.) altitude should be about 144 Hz (24.88 in. Hg.). Normal learned BARO variability is up to ±6 Hz (±2 in. Hg.). If BARO indicates a higher altitude than you are at (7 or more Hz lower than expected), you may have MAF contamination. If available, Service Bay Diagnostic System (SBDS) has a Manifold Absolute Pressure (MAP) sensor that can be used as a barometric pressure reference. Use "MAP/BARO" test under "Powertrain," "Testers and Meters." Ignore the hookup screen. Connect GP2 to the reference MAP on the following screen. NOTE: REMEMBER THAT MOST WEATHER SERVICES REPORT A LOCAL BAROMETRIC PRESSURE THAT HAS BEEN CORRECTED TO SEA LEVEL. THE BARO PID, ON THE OTHER HAND, REPORTS THE ACTUAL BAROMETRIC PRESSURE FOR THE ALTITUDE THE VEHICLE IS BEING OPERATED IN. LOCAL WEATHER CONDITIONS (HIGH AND LOW PRESSURE AREAS) WILL CHANGE THE LOCAL BAROMETRIC PRESSURE BY SEVERAL INCHES OF MERCURY (±3 Hz, ±1 in. Hg.). NOTE: BARO IS UPDATED ONLY WHEN THE VEHICLE IS AT HIGH THROTTLE OPENINGS. THEREFORE, A VEHICLE WHICH IS DRIVEN DOWN FROM A HIGHER ALTITUDE MAY NOT HAVE HAD AN OPPORTUNITY TO UPDATE THE BARO VALUE IN KAM. IF YOU ARE NOT CONFIDENT THAT BARO HAS BEEN UPDATED, PERFORM THREE OR FOUR HEAVY, SUSTAINED ACCELERATIONS AT GREATER THAN HALF-THROTTLE TO ALLOW BARO TO UPDATE.

May 01, 2010 | 1997 Mercury Cougar XR7

2 Answers

97 mitsubshi daimante gdi. Lack of power up hill.

Sounds like its time for a tune up. Start there and your mechanic will be able to note any other abnormal conditions. change fuel/air filter and any other maintenance items you haven't done so far.

Nov 05, 2009 | 1997 Mitsubishi Diamante

1 Answer

Hi, i have a 1992 2.8ltr diesel hilux and when i get to a slight incline it loses power you can have your foot flat in 3rd 4th or 5th and wont accelerate but when you get on the flat it goes fine. it only...

Check your service record for the last fuel filter change. 2 years or less is the recommended interval.

Top off you fuel tank to 1/2 or higher. A weak/failing fuel pump will give losing power condition on hill / high altitude / hot day.

Check the injectors and return lines (top of the injector) for leaks.

When was your last valve adjustment?
Head adjustment should be 1-2 years.

Jul 17, 2009 | 1993 Toyota 4Runner

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