For who knows how long now I've had a sloppy start whenever it is cold. Whenever I start it.... it bogs slightly and misses every few seconds or so for about 10 seconds or so. Instead of being a nice clean BAM start, it struggles for a second or two to get to the cold idle. Like I said, it's only in the cold this happens.

Some details and what I've done/replaced:

91 RS w/ stock motor @ 165k miles

What I've replaced/tested(not so much to cure this problem, but general maintenance). Also, all has been done within the last 5k miles:

Distributor cap
Distributor Rotor
ICM inside distributor
Spark plug wires
Spark plugs
Timing belt <--------- Both engine and ignition timing is PERFECT. I made sure :D
Water pump
Timing belt tensioner
Alternator
All hoses that carry hoses minus the lower radiator hose
Had battery tested and they said it was carrying a perfect charge

Also, to address the loss of the antifreeze. Because I thought it was a bad hg, I performed a compression test. Thankfully, all cylinders showd 185 PSI. Pretty sweet for an engine with 165k miles, and nominal is 185 yay. So, it's not a bad hg. I checked all the hoses besides the lower radiator hose. Also, the system doesn't maintain proper pressure. I can take the cap off after it's warm and barely any pressure is spewed back out at me. Any thoughts?

Power is also all there. To put in perspective, I stayed right beside a new 05 Cavalier doing a 60-110mph pull. I would of beat him since he has a governor from the factory, but I didn't trust the tires I had on there. They also have 140HP and 160FT/lb torque.


My thoughts that come up that either the ignition coils are going bad or the battery I have doesn't have a proper amount of CCA. I get 20city MPG and 25 hwy MPG.

 

Do you ever loose coolant out of the overflow tank?

 

Like did it pressurize out of the overflow tank, like it usually happens with a bad HG? No

Do I lose it out of the overflow because it's just dissapearing? Yes.

 

Any help would be appreciated I actually included tons of details in my "help-me" thread

 

Some more updates :

Alright. I filled the coolant reservoir to it's suggested level ( actually, to the max line, lol. ) This problem is really weird. I replaced the Radiator cap and when I opened it up to check it, I noticed that the coolant was not up to the level as it was when I filled it up two days ago. The coolant reservoir doesn't lose any coolant. What I do notice, though, is that when I do open the radiator cap compressed air shoots up, but as soon as the coolant is gone, none of that obviously follows.

Compression is perfect... Power is all there... No loss of coolant from reservoir.... no foreign substance in the oil... WHERE'S IT GOING

Any help would be appreciated.