GTP Power Loss =(

[MoshimoGTP]

Well, I put the NEW MAF SENSOR on my car and SES Light come off. A lot of problems are gone. But!!!!!!!!!!!!!!!!!!, my car is sometimes hard to start again. I think and the mechanic shop thinks are the fuel injectors maybe are leaking. I see this night the RPM Gauge and they moves a minimum but moves. Maybe Spark Plugs (are new BOSCH Platinium), Wires are new too, fuel filter (new too), another suggestions. I have the TPS and IAC sensors new to install, But the mechanic tells me they are not bad. Help me please.

[Ripn12s]

Get rid of those Bosch plugs and get yourself some Autolite's. You dont need platinium plugs.

I think the Autolite 605 are the correct stock replacement. Autolite 104's are a few heat ranges colder then stock, but have a good following on clubgp. Plus they're only $1 a plug.

Also, use plenty of Dialectric grease on the plugs/wires/coils

Tim

[MoshimoGTP]

Okey im going to change the spark plugs of my GTP. But, if the fuel injectors make me this problem?. The fuel pump was checked and its okey. Help... Thanx

[kilroypr]

Ripn12s I tought that the OEM sparks are platinum tips. Why you would want to use a colder spark on a hot engine like the 3800 GenII SC.
Enlighten me please

[Ripn12s]

With smaller pulleys and increased boost and/or cylinder pressure KR becomes more and more of an issue. We have found that going with a colder plug helps to reduce knock retard giving more power. --- ZZP

We offer these spark plugs in three different heat ranges depending on your level of modifications. Our recommendations are as follows:
Use the Autolite® 605 spark plugs (one heat range colder than stock) if you have a 3800 Series II or III engine engine with up to 6 pounds of boost. At this level, we recommend reducing the spark plug gap to .055", or .035" with nitrous oxide.
Use Autolite® 104 spark plugs (two heat ranges colder than stock) if you have a 3800 Series II or III engine with 6 to 12 pounds of boost. At this level, we recommend reducing the spark plug gap to .050", or .035" with nitrous oxide.
Use Autolite® 103 spark plugs (three heat ranges colder than stock) if you have a 3800 Series II or III engine with 12 to 18 pounds of boost. At this level, we recommend reducing the spark plug gap to .045", or .035" with nitrous oxide. --- INTENSE


Using a plug that is too hot will cause detonation of the fuel to early. Also, Ive never heard that much good hype about Platinun. I've also seen the OEM plugs develope cracks on the porcelain. They also cost way too much money. Why spend $30 on a set of plats when I can spend $6 on some copper Autolites.

Tim

[kilroypr]

OK, got it.
This makes a lot of sense to me when pushing the car like on the track. But what about day to day driving? I have push mine. But for less t han 10 to 15 mins then I let go. And so far with OEM no problems. Your suggestions worlk for day to day driving as well?

[Ripn12s]

If your car is modded then colder range plugs should be in your mod list also. Ive driven on the same AL 104's for about a year and have no problems. I'll be going down to the 103's next season.

Tim