My car starts a bit rough in the morning when cold (at least two tries before it fires up) and takes time to smooth out... I wanted the check the GPs, so last night I checked the relay, checked the fuse, checked the juice, etc. The one and only GP I pulled was German made, tested ok and it glowed real nice - looked good, so I got some questions now:

Question1: Since the fiirst GP seems new is it worth pulling ALL of them out one by one and testing them individually? The problem is that it took my almost 2 hrs to pull, test and reinstall the fist one - there just isn't any room to work...

Question2: Should I pull the high pressure liness off of each Injector to make more room to work?! I'm really leary of doing that but I see no other way to get my hands/tools in there - please advise as it seems real risky to me to take these off... never done that before.

Question 3: The battery only tested at 9.5V with the engine OFF - didn't test with the engine on, but it seems low - could this be a problem with rough starts as the GPs probably like the juice?!

Finally - is there a way to test the overall health of the alternator - if the battery is low, maybe the ALT isn't doing its job...

Lots of questions - sorry, I'm a newbe...

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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K