Question about 1997 GMC Jimmy

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93 GMC has no power and missing

I just had the intake manifold replaced and now it is giving false readings on the tach, oil, and speedo.

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Need to check distributor and timing. Oil sender is also near distributor, maybe it was damaged when intake was replaced.

Posted on Jan 11, 2009

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Posted on Jan 02, 2017

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Would a bad oil pressure switch cause a no start on a 98 b2500


Hi,
Symptoms of a bad or failing Engine Oil Pressure Sensor
  • Oil Pressure Light comes on, and you check the engine oil level, But oil level is okay, you can blame the false reading on the sensor.
  • Oil Pressure Light blinking constantly. This is the normal >check< oil pressure sensor Warning that the sensor is going out.
  • If the sensor is giving false readings, Dispite oil level, the sensor could be replaced.
If the Sensor is currently not working, and does not warn you of engine oil level, and oil level gets extremely low, The Engine could burn up/stall due to lack of oil, and may not restart.
Then you could probably blame it on the sensor.
But really would be lack of oil.

Intermittent No Start,
Common causes deal with 3 basic systems/areas of engin
  1. Compression, its the build up of air and fuel into the engines cylinders. Then is compressed by the pistons. And is under pressure. FAILURE An Air leak (vacumm leak) will allow pressure to escape.
  2. Ignition System, good battery, good relays, wires are not loose or disconnected, good 10volts to starter, 10volts to distributer>gives 20kvolts to spark plugs>has strong spark to ignite compressed air in cylinders. Other sensors need to work. Crankshaft sensor(ccs) Throttle Position Sensor(TPS), +more
  3. Air/fuel Ratio, Air Intake Manifold, and Fuel Pressure Sensor *Fuel Injection Pressure Sensor---if car is fuel injected*, air filter is clean and intake manifold hose, Throttle Plate Acuater, Idle Air Contro Valve(IAC). Also vacumm leak cause no start. To much air not enough fuel will cause lean fuel mixter==low power, low idle, no start.......To much fuel not enough air will cause rich fuel mixter==too much fuel could cause engine knock, flooding of engine wet spark plugs, No Start
Scan Vehicle computer for Codes, Places like AutoZone---Discount AutoParts will connect scanner for free, And Code Will say What is wrong with Vehicle,

Mar 08, 2017 | Cars & Trucks

1 Answer

'94 Gmc Sonoma 4.3L Starts loosing Power and making weird Rattle Noise when reaching operating temperature. Also water tank looks like there is a bit oil in it. Could it be the cylinder head gasket?


Oil in the coolant is usually an intake manifold gasket problem on these engines. If a head gasket failure the engine will normally overheat and give erratic temp guage readings. Make sure the oil level is full. Is the rattle noise coming from the engine? Some times the exhaust (converter) will fail and the catylist will seperate causing a rattle noise from the exhaust and plug it up giving a no power situation

May 23, 2015 | 1994 GMC Sonoma

1 Answer

My 2008 Chevy uplander engine light on and the code shows for cam shaft sensor and intake manifold what I do


The intake code means its leaking from the intake,bad gaskets, or a vacuum leak. check for bad gaskets on intake manifold. You can tell by putting a bit of oil around the maifold. if it is leaking the engine will flair up. To check this, External leak-- Coolant seeps through the broken intake manifold gasket to the outside of the engine. If its bad enough you will see coolant dripping from gasket. Coolant seeps through the damaged gasket to the inside of the engine, mixing with motor oil. If you suspect an internal leak, check your oil dipstick. Or if you have a substance under oil filler cap that looks like a milkshake, Oil is mixing with coolant. this means intake gaskets are bad, Now for the camshaft sensor, If you have a manifold leak. this could be giving you a false camshaft reading! Because, If sensor is bad vehicle will not start unless theres a wire problem. Symtoms of a bad sensor are--- engine sputtering, poor acceleration, stalling/inability to start. HopeI helped you out! Good-Day!

Jul 26, 2014 | 2008 Chevrolet Uplander

1 Answer

Im having a p1133 po171 po300 po175 on gmc envoy 5.3L what could be the problem


Intake manifold gasket leaking.Replace the intake manifold gaskets.

Jan 21, 2012 | 2003 GMC Envoy

2 Answers

I have a 1990 chevy camaro and my rpms r high win the car Is not started and win I start the car thay go even higher


Hi, You could have a vacuum leak. Check all hoses that are connected on or near the intake manifold and throttle body. Good luck.

Aug 14, 2011 | Chevrolet Camaro Cars & Trucks

1 Answer

Dash cluster (speed and tach) do not reset and give false reading. Start and tach could say 4000 rpm's and speed at 80 mph in park.


Hello: You have a bad cluster. The only way to repair is to replace the cluster. It will also have to be programmed after replacement. The cluster was a high failure rate item from 2003 t0 2005.

Dec 20, 2010 | 2005 GMC Yukon Xl Denali

1 Answer

2004 gmc clustor tach speedo oil gauges not working


yes it is you can find some one in your are that fixs them and or you can look on line there is company that dose them call speedo tech hope this helps

Sep 16, 2009 | 2004 GMC Sierra

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