91 300zxTT Starting Problems

[3HundoZeeX]

Ignition turns over, battery is fine but the car just wont start. I have the top of the fuse box off and wonder if it may be a fuse from the ignition coil (haven't touched anything yet). Also I have looked around and heard that the clutch interlock relay switch can also be a problem.

This just started happening this afternoon. The previous time I had the car start it spiked the RPM's fairly high for a start and almost stalled before leveling out to idle. Also the car was idling higher than usual right before it stopped starting. It is rather hot out (about 90) and I had the car in the sun for a couple of hours earlier today. I think that this may be the main link to my problem. Should I wait until it cools down to try and start it again?

Opinions?

I'm not sure if this is related but yesterday I had the wiper arms and plastic covering above the hood repainted. (Getting the wiper arms off took a good bit of work). I'm hoping that I didn't inadvertently knock something out of place...

[BigTDogg (MA)]

It won't even turn over if it's a starter relay or clutch switch issue.

What kind of flywheel do you have?

Check the electrical connections on the back side of the plenum, on the driver side. They are the AAV and the IACV, and either one being disconnected would cause idle issues.

[Ace2cool]

What kind of flywheel do you have?

Just curious to what you're getting at here, T. Not doubting you, just curious to what role an aftermarket flywheel might play in diagnosis...

[3HundoZeeX]

I don't believe the car has an aftermarket flywheel.

I'm thinking that it may be the fuel pump going bad because when I was driving around a week ago I started to hear a droning (wahhoovvoowahhooovv) noise when going over 65. The noise was also more pronounced when turning to the left.

This morning the car started up on the second try. It ran really rough for about 15 seconds then idled like normal. No warning lights were on or anything.

Do these symptoms seem consistent with a fuel pump going bad? The car has 132,xxx and the fuel pump has only been changed once.

[BigTDogg (MA)]

Fidanza and RPS have had issues where the ring gear separates from the AL part. Starter spins the ring gear, but not the FW, so it won't start. Witnessed it first hand on a local guys NA last fall. RPS has since fixed the issue when they sold the design to SZ.

Because he got it to start, it's not the FW.

Doubting me Ace...

OP, check the fuel pressure when the car is running. You can get a gauge from Autozone or whereever and plumb it in between the filter and hardline on the plenum.

[3HundoZeeX]

Thanks for the reply. I'll go ahead and give that a shot. Anyone know of any other potential issues I should be cognizant of while trying to accurately diagnose the problem? Just trying to get as much information as possible.

[PAintballa45]

mine did the exact same thing about a week ago, pull a coil and ground it to the plenum to see it your getting spark. Also check if the plug is wet after cranking over a few times. My alternator was overcharging and blew the pump so test that with a multimeter as well.

[Ace2cool]

Fidanza and RPS have had issues where the ring gear separates from the AL part. Starter spins the ring gear, but not the FW, so it won't start. Witnessed it first hand on a local guys NA last fall. RPS has since fixed the issue when they sold the design to SZ.

Because he got it to start, it's not the FW.

Doubting me Ace...

No, actually, the reason I asked why was because that's exactly what I'm going to be putting in the TT. I have the 11lb RPS aluminum flywheel. Just askin questions to the expert!

[BigTDogg (MA)]

No, actually, the reason I asked why was because that's exactly what I'm going to be putting in the TT. I have the 11lb RPS aluminum flywheel. Just askin questions to the expert!

Just phuckin with you. The older RPS had this issue, but I think RPS flywheels manufactured after 2006 and the recent SZ flywheels don't have any problems.