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What are some of the things that can cause engine surging under load

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Fuel, air fuel mixture. engine HP loss, governor.
What type of load? inductive? capacitive? cyclical? HAVC

Posted on Nov 17, 2013


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I have a 1997 Hyundai Excel and its surging at about 3000 rpm and under load like climing hills what would cause this. Tia

Engine is surging or the transmission slipping? My guess is the transmission is slipping, letting the engine rev up to 3000. Does it feel like it quits pulling?

Oct 09, 2016 | Hyundai Cars & Trucks

1 Answer

I have a 2006 Impala the engine is surging at idle and when I driving

Check the vacuum hoses for a leak.

2006 Chevy Impala LS 3.5L Surge Under Load - YouTube

? 3:09
Jan 22, 2013 - Uploaded by Gary Castle, Jr
Surge while driving. ... 2006 Chevy Impala LS 3.5L Surge Under Load ... How To Fix Or Prevent Stalling, Surging Or Rough Idle, Cleaning ...

Oct 02, 2015 | Cars & Trucks

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Engine surge at 60 mph

on flat ground? 60mph.
my guess, is, its running lean.
use a scan tool (real no useless code readers)
and look for closed loopstatus at 60mph. and idle.
if its not going to CL, status, that IS the top symptoms.
and LTFT, (long term fuel trim)
+5% Is typical, +40% is lean.

lean is caused by many things, sorry more tests.
one, is low fuel pressure.

(or under reported, air , for any reasons. MAP or MAF based engines)
under reported, caused, lean.
in closed loop this is corrected.
at wide open throttle on hill if power is low, that might be low fuel pressures , so does it do that?

Jul 08, 2014 | 2006 Suzuki Grand Vitara

1 Answer

What causes the govenor to "surge"

This is fuel starvation, check inline filters, check the brather in the filler cap, remove float bowl and blow out main jet with air line.

Jul 11, 2012 | Garden

2 Answers

Engine sputters under load. engine surges then drags---sometimes it runs normally then for no reason problems arises again.

Have your EGR valve checked. Defective EGR valve will cause all the symptoms youare experiencing

Oct 08, 2009 | 1994 Suzuki Sidekick

2 Answers

S80 engine surge at idle

You could have a bad or contaminated Mass Air Flow (MAF) sensor. You can get a used one online for less then 100. You can also purchase a can of MAF sensor cleaner at a local auto supplies store and clean it. It located right at the air filter housing.

Aug 03, 2009 | 2000 Volvo S80

1 Answer

Racing of a Honda 160 CC lawn mower engine

When a small engine "surges" in all speed ranges the possible causes are:

*Dirty air filter

*Water or contamination in the fuel system.

*Breaks in the spark plug wire (leaking), loose or corroded terminal connections causing an intermittent failure.

*Misadjusted or malfunctioning governor.

Problems with surging only when under load or at idle are likely caused by carb blockage or misadjustment.

Hope this helped and good luck to ya!

Jul 20, 2009 | Husqvarna 160 CC Honda OHC Engine 21 in

1 Answer

Engine on riding lawn mower surging

Dirty air cleaner.

Clogged fuel filter.

Replace or clean both...

May 29, 2009 | Garden

2 Answers

Surging under acceleration

Surginng is normally an indication of a lean mixture on any engine. Other causes can be a problem with the vacuum advance unit. This can easily be checked by disconnecting the vacuum line to the distributor and plugging it. Then drive the car to see if that is the cause. If that is the cause don't just drive it that way, connect a vacuum gauge and run the hose out from under the hood (bonnet) and put it under a wiper blade and drive the car noting the vacuum under idle, driving and acceleration and e-mail me the results.One more thing to check is to remove the float chamber vent lines from both Stromberg carbs and make a test run. If vacuum is not the problem, look toward a lean / fuel problem. You can get a rough picture of a Lean or Rich mixture without CO equipment. It is called "Taking a plug reading" This was easy when leaded fuel was used but now that all fuel is unleaded the art was lost. However, it still works, but not as easy. Here is the proceedure. You need to find a straight area of road that has a wide shoulder and not much traffic. With the engine temp up, run the car at the condition or speed at which it runs the worst. In your case hard acceleration for about 10 or 15 seconds. Here is where you have to be careful as you have to turn off the ignition at the exact time you release the throttle. The reason you have to be careful is because if you turn the key back too far you will lock the stearing wheel. Practice it going slowly first to be able to do it without locking the wheel. When you can do it correctly, do it for the test. Pull off the road and remove the front spark plug and the rear plug and examine them closely. A lean condition will show up as a very clean center electrode. A rich mixture will be a flat black powder deposits all over the end of the plug. If it shows clean, look at the most common fault of the TR-7s by checking the fuel pressure with a pressure gauge placed between fuel pump and the carbs. You should get or borrow a gauge and add a two foot hose so it can be placed under the wiper blade so you can see it while under acceleration. This will put the engine in the most fuel useage where a slightly low pressure will show up. The TR-7 fuel pumps are noted for the diophrams getting hard and not flexable so the return spring (the only part that supplies fuel pressure) can't move the stiff diophram to keep up with the fuel usage under acceleration. Just reving up the engine with no load is not usually enough to see the pump pressure fail. The first signs of this is when you have very little fuel in the tank. When the tank is full it don't do it as much. The TR-7 fuel tank is verticle so a full tank applies a little pressure to the pump helping it along. I hope this helps, If you need further help you can e-mail me at and look at my tech tips on my web site.

May 15, 2008 | 2006 Triumph Tr 7

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