4.3 Hell.

CYNERGY

MEMBER
GMC SAFARI

Hi all, I have a 94’ GMC safari (astro van) and for some time now I have been experiencing starting trouble. The van would start fine in the A.M but as the day wore on the starting problem worsened, I would turn the engine over but it would NOT catch... I would have to wait 5-10 minutes before I would try again, and then it would hard start, I have fuel, spark and a clean air system but no go. So I decided to give it a “tune up” plugs, cap, rotor, fuel filter and so on. I have properly replaced all components and now the van just turns over with no start..... Any ideas... Please

6 Replies

SMOKINFLOYD4.3

MEMBER
56 POSTS

I got the 4.3 blues too, wait I got it! 350 motor swap! Thats what im gonna do to my blazer if I dont get the v6 right

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Thursday, January 5th, 2006 AT 6:17 PM

HOTWHEELSGMC

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31 POSTS

Could be a bad feul pump or filter. If it's turning over but not starting.

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Monday, January 9th, 2006 AT 7:36 PM

KENVCR

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105 POSTS

Did you clean the rotor shaft before putting in the new rotor. Use fine sandpaper to remove any rust and vacuum debris out. Pick up coil in distributor may be shot. Was there a lot of rust under the cap? I suggest you find a cheap repair manual like the chiltons or haynes. Helps making diagnosis so much easier.

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Wednesday, February 1st, 2006 AT 4:55 PM

MVANNESSJR

MECHANIC
223 POSTS

With all of the work you have done I would check each plug for proper gap and it is properly seated in the block. I would also make sure that the wires are going to the proper place on the distributor cap (wrong fire order will cause a crank but no start). Double check your work on the cap and rotor for the same reason. Lastly check to make sure your fuel pressure is accurate.

I would think that the problem will be related to the "spark" and "timing".

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Thursday, February 2nd, 2006 AT 7:21 AM

CHEVY350GUY

MECHANIC
109 POSTS

The initial problem could be starter related I would ceck that. For the no start check to see if the rotor can be put on in different positions. If yes you may have installed it backwards. If not check for fuel pressure, and carrect firing order. Im also interested to know about any other parts you put on.