Question about Chevrolet S 10

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2001 sonoma 4.3 stumbles at about 3000 rpm in park and driving it loses power and the tachometer jumps back and forth?

I have checked the tps,map,ait sensors, no visible vacuum leaks,and parts store scan said it threw a code for the crankshaft sensor which i replaced. It seems from talk the fuel filter is a possibility but it seems to happen at the same rpms.

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  • Chevrolet Master
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Was the distributor ever removed from the motor

Posted on Nov 29, 2012

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017

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SOURCE: 2000 ford explorer 4.0 x-engine is stalling, missing and lose power while driving

Exhaust might be stopped up. Check the catalytic converter and or muffler.
Good luck!

Posted on Oct 15, 2008

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SOURCE: PO171 OBD-II Trouble Code " System Lean To Bank 1

Check PCV valve and be sure it is not stuck open.  Check for vacuum leak at intake manifold.  

Posted on Jan 01, 2009

  • 750 Answers

SOURCE: the tachometer jumps

did you check the cam sensor? the cat? ae you loosing power at 2000 rpm?

Posted on Sep 30, 2009

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SOURCE: 1989 Bronco II have replaced fuel

Is it the 2.8? I am just thinking of what cycles and would cause the engine to run bad. The fuel relay would not be the problem. Because if it doesn't close, then the engine does not run at all. The power distribution box is a possibility. But I am thinking about what you are saying the problem cycles. That is the strange thing. I think that the cycling has to do with pressure in the fuel tank. Have you tried changing the gas cap? That could be all that the problem is. But it could also be the vent in the fuel tank. The reason why I am thinking this is because the fuel tank builds pressure from the gas sloshing around and when it builds up too much pressure then it relieves. What do you think?

Posted on Dec 15, 2010

SOURCE: 98 Chevrolet Silverado runs rough at half throttle and past.

try removing the EGR valve and clean inside of it and manifold

Posted on Feb 17, 2011

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2002 jaguar xj8 when I drive it won't go over 3000rpm

Jaguar wont rev 3000 rpm Questions & Answers - Fixya > Forum > Tags > wont rev 3000 rpm
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1998 Jaguar XJ8 won't rev over 3000 rpm ... engine cuts out and shudders at 3000 rpm won't accelerateobd code p0332 2002 jaguar x type 3.0 l P0332 - Knock ... Car is boging out in park and will not go over ... driving, don't worry about it.

Rev Won't go up

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1 Answer

Why does it pull back while driving?

Code Reader or Professional Scan Tool ?

Why was the distributor changed?
What started all the parts replacement?

Was any testing-- of anything done,BEFORE parts went in?

You have no vehicle problem,details,symptoms or what
problem your having an issue with

TPS Sensor---does it get adjusted ?
Exhaust Converter -how old & blocked?
Egr --issue?
Vacuum Leaks?
Worn Timing Chain?
Oxygen Sensor in control of fuel (Closed Loop)
Engine Temp--is what when hot?

Nov 23, 2014 | 1994 Chevrolet Astro

1 Answer

Smog code p0108

this is for the MAP sensor , it can also be a wiring fault and not the actual sensor so i've copied and pasted to save time a guide
Symptoms Possible sumptoms of OBD code P0108
MIL (Malfunction Indicator Lamp) will likely be on Engine may run poorly Engine may not run at all Fuel mileage may decrease Presence of black smoke at exhaust
Causes Possible causes of OBD code P0108
Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum
Possible Solutions A good way to diagnose if the MAP sensor is to blame would be to compare the KOEO (key on engine off) MAP sensor reading on a scan tool with the Barometric pressure reading. They should be the same because they both measure atmospheric pressure. If the MAP reading is greater than 0.5 volt off of the BARO reading, then replacing the MAP sensor would likely fix the problem. Otherwise, start the engine and observe the MAP reading at idle. It should normally be about 1.5 volts (varies according to altitude). a. If it is, the problem is likely intermittent. Check all the vacuum hoses for damage and replace as necessary. You can also try wiggle testing the harness and connector to reproduce the problem. b. If the scan tool MAP reading is more than 4.5 volts, check the actual engine vacuum reading with the engine running. If it is less than 15 or 16 in. Hg, then the PCM is probably not seeing enough vacuum (due to a worn engine, perhaps) for a given operating condition (which causes a higher than normal voltage signal to the PCM) and setting the code. Repair the engine vacuum problem and retest. c. But, if the actual engine vacuum reading is 16 in. Hg or more, then unplug the MAP sensor. The scan tool MAP reading should indicate that there is no voltage present. Check that the ground from the PCM is intact and also that the MAP sensor connector and terminals are tight. If the connection is good, then replace the map sensor. d. However if, with KOEO, & the MAP sensor unplugged, the scan tool shows a voltage reading, then there may be a short in the harness to the MAP sensor. Turn the ignition off. At the PCM unplug connector and remove the MAP signal wire from the connector. Re-attach the PCM connector and see if with KOEO, the scan tool MAP reading shows voltage. If it still does, replace the PCM. If not, check for voltage on the signal wire you just removed from the PCM. If there is voltage on the signal wire, find the short in the harness and repair.

hope this helps

Jul 08, 2014 | 2001 Pontiac Sunfire

1 Answer

My 94 nissan sentra doesn't run smooth over 3000 rpm or if you mash the gas pedal

I have a 2000 Chevy Tahoe that did the same thing. I changed the oil pump, new oil, and head gasket. It now has power and doesn't fall on its face when I step into the throttle hard. Hope this helps.

Apr 21, 2014 | 1994 Nissan Sentra 4-Door

1 Answer

Replaced idle air control sensor, idle rpm to high? 1200

I believe your referring to the mass air flow sensor, poss MAP sensor

Apr 10, 2017 | Saturn SL Cars & Trucks

1 Answer

How to troubleshoot bad EGR circuit on 1988 Ford Ranger Injected

Have you checked for vacuum leaks at all lines and going to the MAP sensor? It also has a TPS(throttle position sensor) and CPS(crankshaft position sensor),I think.
I'm thinking vacuum leak or TPS. don-ohio

Jun 04, 2017 | 1988 Ford Ranger

1 Answer

Code p1128 weak mixture lose power on inclines engine light on melts spark plugs vehicle hyundia accent 2001

Go to and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc. To diagnose a 2000 or 2001 1.5L Accent Diagnostic Trouble Code (DTC) P1128 (FUEL SYSTEM LEAN -- PART LOAD), check the following:
  • Check the intake system for air leaks.
  • Check that the Mass Air Flow (MAF) Sensor (P/N 28164-22610) operation meets the specifications listed below. If the MAF sensor output is significantly lower than the reference value (10% or more), then replace the MAF sensor.
Table 1: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
MAF (kg/h) 10
Table 2: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
MAF (g/h) 2.8


Table 3: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
MAF (kg/h) 9.5
Table 4: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
MAF (g/h) 2.5

Jun 26, 2011 | Hyundai Accent Cars & Trucks

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