Motor stumbles badly when first started

[Railroader]

Hello: Friend has a 1987 Voyager 6 cyl with Throtle Body Carb, and when the engine is first started is acts like a carburated system that has a choke that is not working. Any ideas on what could be causing this, bad sensor, etc. Any thoughts welcome. Thanks

[glemieux]

first check the vehicle for any trouble codes,make sure all electrical connections are clean,try adding some fuel system cleaner,maybe even a new fuel filter...sometimes the injectors get dirty and malfunction,also try a complete tune up

[malbi]

I have 96 Grand Voyager 3.3L which does the same thing. Now check engine light came on. Could it be the same problem?

[glemieux]

Originally Posted by malbi

I have 96 Grand Voyager 3.3L which does the same thing. Now check engine light came on. Could it be the same problem?

i would first check your ignition(spark plug) wires...when cold they can't conduct the spark properly...also inspect your distributer cap,rotor,and spark plugs for abnormal wear and tear,this would also make it stumble...usually when the fuel pump goes bad,it just goes

[slantsixness]

Check the codes,
Probably the EGR valve is plugged up, and you could have a vacuum leak there, and ;
clean the throttle body real good. run some fuel injector cleaner through it and see if all this improves the morning bucking.

You may need a new O2 sensor, and the throttle position sensor isn't out of the question either, but that would mess up all the time (warm too.)

Good luck,

Slantsixness

[malbi]

Originally Posted by slantsixness

Check the codes,
Probably the EGR valve is plugged up, and you could have a vacuum leak there, and ;
clean the throttle body real good. run some fuel injector cleaner through it and see if all this improves the morning bucking.

You may need a new O2 sensor, and the throttle position sensor isn't out of the question either, but that would mess up all the time (warm too.)

Good luck,

Slantsixness

Thanks! I got the computer codes from my 96 Grand Voyager, they are 12,43,55. Any suggestions on what to look at. I think 43 is the main one. Any help would be appreciated.

Thanks,
malbi

[slantsixness]

#43 Peak primary coil current not achieved with max dwell time
OR
# 43 Cylinder misfire
OR
# 43 Problem in power module to logic module interface
If it's a 3.0, check you cap, rotor and wires, or maybe even a bad spark plug or a new one that's not gapped right, or the plug electrodes are degraded...
I still wouldn't rule out the O2 sensor and the throttle servicing though...

[malbi]

Thanks! It is a 3.3 Liter but I'll check the items you mention. It did seem to misfire when the problem occured, or it could have been that the plug didn't fire at all. Seemed like there was no igintion in a cylinder.

I diconnected and reconnected the battery and the service engine light is not on anymore.

How do I get to the rear 3 spark plugs on a 96 Voyager 3.3L?

[slantsixness]

get the plugs from underneath the van, up through the exhaust cavity with an extension and /or a swivel socket.

[malbi]

Thanks! Seems like a pain in the ass but I'll give it a try. Very bad design.

[slantsixness]

not as bad as some, worse than others

They're easier than most FWD vans!
Try a 90 V6 camry once, you won't consider the plug change on your van a pain any more!