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Car has 1.8L engine cutsout/jerks under load has new pcm map sensor distributor new cap rotor wires and plugs fuel pressuer ok exhaust not plugged

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91 honda civic 1.6 no power while hitting the gas not until I hit 3000 rpms replaced tps and timing belt no change was doing this before all the work and new o2 sensor


Is the fuel pressure ok under a load? Is the MAP sensor good? Does it have a good vacuum signal from the engine? Is the timing belt set up properly, it may have jumped a tooth (should be replaced about every 60,000 miles). Is the exhaust free flowing with not excess back pressure?

Dec 20, 2016 | 1991 Honda Civic

3 Answers

No spark


First does the rotor turn when cranking engine?? possible timing chain is out or stripped gear..are you sure it has no spark??did you verify this with a high output spark tester ? did you spray starting fluid in the tbi unit ?

Mar 23, 2012 | 2000 Chevrolet Astro

1 Answer

Engine is jerking & cutting out-new plugs,wires,fuel filter,etc.What else could it be?


Bad distributor cap or rotor. Timing belt/chain slipping. Faulty fuel injectors. Vaccum leak. MAP sensor. Clogged air filter. Any codes?

Feb 12, 2011 | 1995 Nissan Pickup

1 Answer

My 1990 ford f150 is smoking black exhaust what could be causing this?


Hello Warebaby.
Black exhaust indicates unburned fuel.
This can be caused by many things.
Bad ignition-spark plugs, wires, distributor cap, rotor, coil, ignition timing.
Excess fuel going in- bad injector, fuel pressure regulator.
Electronics-map sensor, throttle position sensor, oxygen sensor being most common.
Could be a good time to tune it up first

Dec 04, 2009 | 1990 Ford F150

1 Answer

93 ply 3.0 idles okay,bogs when throttled,won't run.


YOU COULD HAVE A RESTRICTED EXHAUST.MUFFLER PLUGGED STOPPED UP ALSO THE CATALYTIC CONVERTER COULD BE PLUGGED.

Nov 01, 2009 | 1993 Plymouth Voyager

1 Answer

4.3 Liter V-6 Idles rough when in gear, runs fine on highway.


Can you check fuel trims at idle and under load?
If fuel trim is high at low speed and load, look for a vacuum leak.
If fuel trim is high at high speed and loads, look for fuel volumn problem or restriction.
If fuel trim is high at all speeds and loads look for pcm input fault, maybe a maf sensor problem?
If fuel trim is negative low speed and load, look for fuel pressure regulator or injector leak. If fuel trim is negative at all speeds and loads check ect and iac.

If you have the spider fuel system, that system is noted for problems. key on engine off, 60--66 psi fuel pressure.

Mar 06, 2017 | 1999 Chevrolet Silverado 1500

2 Answers

Engine power loss


Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). in this list u will find a answer to ur problem Shaun 2 Inspect Spark Plug Fouled, damaged or broken spark plug(s). 3 Inspect Fuel Filter Clogged or dirty fuel filter 4 Inspect Distributor Worn, loose or incorrectly adjusted distributor. 5 Inspect Distributor Cap Loose or cracked distributor cap 6 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. grey_line.gif 7 Inspect PCV Valve Plugged or damaged pcv valve. grey_line.gif 8 Inspect Air Filter Restricted or clogged air filter. grey_line.gif 9 Inspect Catalytic Converter Clogged, damaged, defective or faulty catalytic converter. grey_line.gif 10 Inspect Automatic Transmission Improperly adjusted kickdown cable adjustment or internal transmission problems. grey_line.gif 11 Inspect Fuel Pump Improperly functioning fuel pump or circuits. grey_line.gif 12 Inspect MAP Sensor Improperly connected or faulty m.a.p. sensor. grey_line.gif 13 Inspect Mass Air Flow Sensor Improperly connected or faulty mass air flow sensor. grey_line.gif 14 Inspect Throttle Position Sensor Faulty throttle position sensor or throttle position sensor circuit. grey_line.gif 15 Inspect Timing Specification Incorrectly adjusted engine timing. grey_line.gif 16 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. grey_line.gif

Nov 13, 2008 | 2002 Chevrolet S-10

3 Answers

1991 V.W. jetta 2.0 16v


If you facing a little black smoke along with it your engine is running a little rich. Black smoke indicates unburned fuel and this could cause a black stain and leading to test failure

Jul 06, 2008 | 1991 Volkswagen Jetta

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