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Changed thermostat and sensor now van won't start

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U switched up the wires

Posted on Oct 28, 2012

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Posted on Jan 02, 2017

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I changed the fuel pump but the van still won't


And you know the fuel filter is good? Could be injector problem: just as a check, spray some starting fluid into the intake and see if engine runs a few seconds. If it does, it is a fuel problem. Check injector fuse, as a start. Check fuel pressure. Check injector circuit. If engine won't start with starting fluid, check if you are getting spark. Problem may be in the ignition system.

Aug 13, 2013 | Cars & Trucks

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GMC safari won't start, new coil, ICM, plugs (delco) Wires, cap, rotor, get's gas, new starter.


This just happened to my Dad's 1998 GMC Safari...

Firstly...

Check the hard vacuum line as previously noted by others.
If that's ok, then take off the intake pipe and spray brake clean into the throttle body while trying to crank it.

If it starts.. then you have a fuel related issue, if it doesn't start then you have an electrical related issue.

Our van did not start after trying to use brake clean.

Take off the console inside the vehicle's cab and get at the distributor.

Usually people noted that the ICM (ignition control module, inside the distributor) was the main issue here, but on our van, the distributor and wires looked brand new so it was probably recently changed (we got this van 5 months ago), so I assumed the spark plugs were also changed at the same time.

We unplugged the connection from the coil to the distributor, tried to crank it, and no spark was being generated, boom, got a new coil and starts up fine.

Just takes a bit of trial and error.

Dec 16, 2012 | 1996 GMC Safari

1 Answer

Van won't start - no spark. Changed Ignition coil, ignition module, distributor cap and rotor. Still no spark


CHECK IGNITION FUSE, DEPEND ON MODEL VECHICLE COULD HAVE BAD CRANKSHAFT POSITION SENSOR.

Aug 06, 2011 | Chevrolet G20 Cars & Trucks

1 Answer

MY 2002 DODGE GRAND CARAVAN, 3.3 started out by stalling. we took it for diagnostic, mechanic said catalytic convertor bad. changed that and coil. changed map sensor, both O2 sensors. took it to another...


does the van stall going down the road or at idle? the won't change gears at 4000 rpm and the no start condition unless disconnect the negative cable sounds more like a computer problem. when the cable is diconnected the ECM and the TCM have to go thru a relearn process which can be some of your issues. have your mechanic do a quick learn on the trans module to see if it helps the shifting problem. the ECM on the other hand can throw out codes that can make you chase your tail and end up replacing every sensor and still have the smae problem. you may want to check for corrosion at the ECM connections.

Jul 19, 2011 | Dodge Grand Caravan Cars & Trucks

2 Answers

The trouble began by my van not shifting out of 2nd care... van had gone into limp mode. Shortly there after, the engine light came on and my van started to overheat. We ran the codes and got PO720,...


Hi,
The codes you gave are:
P0720 = Output shaft speed sensor error P0731 = First gear incorrect ratio Replacing the Output shaft speed sensor should clear that up and help your transmission. Around $20 or so. The limp mode is probably caused by a faulty cam position sensor or crankshaft position sensor. Overheating: Did you verify that your cooling fan is coming on? Kicking into a higher speed with the A/C on? Thermostat of the correct heat range and installed with spring end into engine block? Coolant is not rusty looking or weak? (check specific gravity) Flush and refill system if not nice and green or orange/ is rusty looking. Water pump is circulating coolant properly? (open radiator and observe circulation, feel top hose for fluid surging) if not, bad pump. Any of those will cause overheating. Hope that helps! Please rate this answer.....Thanks, Mike

Jun 14, 2011 | 1996 Dodge Caravan

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I just changed the thermostat in my chevy g20 van. I had to unplug a plastic line just above the thermostat to get the thermostat housing loose. I reconnected the plastic line after installing the...


Did you unplug the coolant sensor near the thermostat when you changed the thermostat?
Check it for a bent/broken pin or a bad connection.Black smoke and a check engine light can be a sign of a possible coolant temp sensor problem.
You should run the codes to check what the van is actually asking for and don't forget to recheck the coolant level after you have driven it a bit,WHEN IT IS COLD!A great van to own!

May 04, 2017 | 1995 Chevrolet G20

1 Answer

Van overheating when stuck in traffic fan not coming on changed two sensors engine temperature and temperature controlno change. Fan does work when put power to it externally. Van still overheating when...


u should check for a faulty thermostat first, they are only a few quid and easily replaced. if no change ur most likely faults are a blocked radiator or faulty water pump. u dont sayhow old ur van is but after the thermostat go to the radiator, when its hot check the bottom of the rad to make sure its hot, also brown water means u need to bback flush ur cooling system. even tho u have changed some sensors doesnt mean u got the fan switch sender, dash board sender and fan sender tend to be different sensors, so just double check.

Jul 04, 2010 | 1992 Plymouth Grand Voyager

1 Answer

One day starts next it does not start


if there is no service light on. it might come on at a later time. but in my situation the thermostat need to be changed and the engine coolant temperature sensor circuit. the sensor was broken and it would shut off the van after it started or after the engine warmed up it would not let it start. the code was P0118. You can have you engine light checked at any autozone. hope it helps.

Mar 27, 2009 | 1999 GMC Savana

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