I have a 98 4 door blazer with 150.000 km in Costa Rica. I have LPG installed.

Lately I have some difficulties when it is humid outside.
* It has difficulty starting when it is humid. When it hasnīt rained, no problem,
* If I havenīt used the car for 3 days, it gets really difficult to start.
* I get a stutter when revving a bit. And when accelerating, around 2000rpm.
* The stutter disappears completely after driving 30 minutes.
* Starting is always on gasoline. After that it switches to LPG. But I can switch back to gasoline. The stutter is exactly the same on either fuel.

So my "handyman"/mecanic thinks it may be coolant (100% water) entering a cilinder, and changing the seal may resolve the problem. I may have had a overheating problem when a refrigeration hose ripped some months ago.

However, that does not explain why the problem is so correlated with the outside humidity.

he checked the sparks, and says one is a little different in color, indicating humidity in the cilinder. The cables are newish. He cleaned the rotor cap and it does not show cracks.

So, is changing the cilinder head seals going to resolve this problem?

Thanks for reading this far. Any comments are really apreciated.

Cheers,

Bart

 

Could still be the cap, is acdelco? These trucks are fussy with caps. I would try new cap, rotor. If that doesnt help new wires (good ones)

 

thanks. ORdered new cap and rotor. Will let you know whether it worked. In a month or so, I will be travelling.

Regards,