Question about 1991 Chevrolet S-10 Blazer

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Loss of power in a strain and spark knock

The van runs ok but when it gets in a strain like a long incline it loses power and make a spark knock??

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  • Mike Butler
    Mike Butler May 11, 2010

    When was last tune-up? How about having exhaust checked for restriction like plugged catalytic converter ?

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  • 320 Answers

Possible real bad gas but I'd bet its the timing

Posted on Jun 03, 2009

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My peugeot 206 does not have power


Give more information. Loss of power can have many causes, depending on how and when you lose power. I no power from start, could be bad spark plugs, clogged intake or throttle position valve not opening properly, and that also for a number of reasons. You could also have a blocked exhaust - If you drove over a sharp hump and knocked the exhaust, it could cause a blockage.
If power is good on take -off and you lose power during driving, it could be your engine control module (ECM), either faulty or responding to a fault (check, or have a mechanic check) Diagnostic Trouble Codes (DTC's). Your car could be overheating, and the ECM is switching to limp mode, which feels like loss of power. This is designed to cut engine power to get you to a garage without further damaging your engine.

Sep 27, 2014 | Cars & Trucks

1 Answer

I don't have any power at the ignition coil on a 1987 wrangler, any place to start ? thanks


fuses are always first.
you said no power to the coil that means 12vdc power.
so hows car run with no power to coil no electric power?
ok, seems its , running good, then you lose engine power (not usage of word engine) then you find loss of 12vdc power to the ignition coil
you blew a fuse.
1987, carb engine
no engine stated, making any spark help near impossible
2.5L Vin H, TBI injection
4.2.L Vin C, 2bbl carb.
apples and oranges different (huge difference)

the 4.2 liter gets power from a ballast resistor.
on the yellow wire . the igntion switch feeds the this resistor
the green wire, goes to the ignition module.
this wire reads 12v key on, then when cranked, or running
the module grounds the green wire for about 5/1000s of second
and then release this ground making Inductive spark (Tesla action)
. that is how the 4.2 works.

so what engine.?? some have 4.0 engine. so???


Sep 19, 2014 | 1987 Jeep Wrangler

1 Answer

All of sudden loss of power lifter knock


If the lifters are knocking that means they aren't getting oil. Check the oil level in the motor. If the oil is full and the oil pump is working as indicated by not getting an oil light, you might have a blockage in the internal oil passages that are blocking oil to the cam. This will cause the cam to wear very quickly and your motor will run hotter and lose power.

Sep 14, 2014 | Cars & Trucks

1 Answer

Ford transit 110 T280 I've back smoke on excellaration and loss of power on inclines; could it be the EGR valve at fault ; also have management warning light on.?


Needs piston rings. You have lost compression so you are losing power. The oil is getting pasty the worn rings and entering the combustion chamber which would explain the black smoke and loss of power.

May 18, 2014 | 2009 Ford Transit Connect

1 Answer

My ninja is losing power when i get into it. Idles great on all 4 but when i get going it loses power and seems to be just running on 3 cylinders. I have change spark plugs and wires and that didnt help....


Test the Coils . The coil produce the high voltage for wire plugs+spark plug+motor. If the coil is defective you ignition system can be wrong. see the diagram attached.
God bless youe86b1ba3-9407-460b-8b08-909b8f897113.jpg

Jun 20, 2013 | Cars & Trucks

2 Answers

Van acts like the fuel filter is plugged, and losses power when going up hills


Do you have a fuel pump? If its bad or weak, you aren't getting enough gas to your engine. Has anyone thought of the filter in your gas tank?

Jun 14, 2013 | 2002 Oldsmobile Silhouette

1 Answer

Car starts and runs drivers ok on flat ground,loses power on a hill


could be a head gasket that is losing pressure going up a hill with the added strain.

Apr 21, 2013 | 1998 Pontiac Sunfire

2 Answers

1995 toyota camry sound from lower timing cover, and loss of power selectively


Depends if it is a no tolerance motor, which means bent valves.

May 24, 2017 | 1995 Toyota Camry

1 Answer

Snock sensor location nissan1994


Well the knock sensor is located under the lower intake manifold, between the two cylinder banks in the valley. It's about a 3 hour job for an experienced technician, but I have to ask why you want to replace it.

If you have a knock sensor code on any Nissan replacing the knock sensor will not fix it. The knock sensor detects unwanted engine vibrations,such as spark knock. So if you have a knock sensor code first check your spark plugs, are they ok? (if not replace them). Next Quest vans are known for clogging fuel injectors so I'd recommend running a can of sea foam injector cleaner or going to your local shop and having a professional injector cleaner run through your car.

If problems still persist after having good plugs and running an injector cleaner through, other things to look for would be intake leaks (vacuum leaks), bad mass airflow sensor or a jumped timing belt, which you will need an experienced Technician to check

Sep 14, 2012 | 1994 Nissan Quest

1 Answer

Car runs great but suddlenly loses power or goes off. I replaced fuel pump and filter. Hard to tell if its electrical or a fuel system problem. Injectors, spark plugs look ok.


Have someone look at your MAF air flow sensor. It is a known problem on that generation Maxima and causes sudden loss of power and stalls.

Sep 08, 2011 | 1996 Nissan Maxima

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