1995 993 Cold Start Issue
Thread Starter
Rennlist Member
Joined: Oct 2018
Posts: 96
Likes: 53
From: Costa Mesa
1995 993 Cold Start Issue
Hello all,
My 1995 993 requires me to give it some gas during a cold start for it to fire up. It usually takes about 5 seconds for the car to start. Once it's up and running I have no issues when the car is warm. When I turn the ignition on, I hear the fuel pump running and have checked it with a voltmeter. Any advice on why it would be doing this?
If it helps, the engine is rock solid and runs very well besides this delayed start.
Thanks!
My 1995 993 requires me to give it some gas during a cold start for it to fire up. It usually takes about 5 seconds for the car to start. Once it's up and running I have no issues when the car is warm. When I turn the ignition on, I hear the fuel pump running and have checked it with a voltmeter. Any advice on why it would be doing this?
If it helps, the engine is rock solid and runs very well besides this delayed start.
Thanks!
Rennlist Member
Joined: Jun 2004
Posts: 1,971
Likes: 43
From: Baltimore, Md
I'd check your fuel pressure regulator and check valves.
I thought you might be interested in reading this web page:
https://rennlist.com/forums/showthre...ferrerid=24812
I thought you might be interested in reading this web page:
https://rennlist.com/forums/showthre...ferrerid=24812
Drifting
Joined: May 2006
Posts: 3,074
Likes: 205
From: Paris
Both are cheap to change if you DIY.
Check valve is a small nipplie type threaded 3 cms tube , acting like the fuel pump outlet.
it is 50ish by itself, but if you order from bosch, the check valve comes with the pump bosch 0 580 464 058
better to get the pump
Fuel pressure regulator is under engine electric air heater/cooling system on the left of the engine
Check valve is a small nipplie type threaded 3 cms tube , acting like the fuel pump outlet.
it is 50ish by itself, but if you order from bosch, the check valve comes with the pump bosch 0 580 464 058
better to get the pump
Fuel pressure regulator is under engine electric air heater/cooling system on the left of the engine
Last edited by geolab; Dec 15, 2020 at 01:56 PM.
Pro
Joined: Feb 2020
Posts: 573
Likes: 154
From: Texas
I had a similar problem that ended up being a battery issue. A parasitic drain hurt the battery to where the CCA’s were below its rating. I had to replace it and I haven’t had any issues since.
Have you had your CCA’s checked?
Does the trunk light turn off when you close the hood?
Have you had your CCA’s checked?
Does the trunk light turn off when you close the hood?
Thread Starter
Rennlist Member
Joined: Oct 2018
Posts: 96
Likes: 53
From: Costa Mesa
All great tips! Thanks for the feedback! I suspected it could be the check valve or FPR. Didn't consider the battery though! I'll dive into these and get back to everyone.
Thanks again!
Thanks again!
Drifting
Joined: Jul 2012
Posts: 2,182
Likes: 339
From: Santa Cruz, CA
Battery is good to check.
Also electrical connectors to the multiple temp sensors. Give 'em a spray and unplug-plug a few times to wipe contacts.
Are you getting any codes? A 993-friendly ODB reader will help immensely.
Also electrical connectors to the multiple temp sensors. Give 'em a spray and unplug-plug a few times to wipe contacts.
Are you getting any codes? A 993-friendly ODB reader will help immensely.
Trending Topics
Pro
Joined: Feb 2020
Posts: 573
Likes: 154
From: Texas
You may already know, but it’s common for the door, hood and/or decklid switches to fail to where your interior lights won’t turn off even when everything’s closed up and locked. It could be as simple as a metal tab being bent out of place or you might have to replace things.
The metal tab on the bottom of the hood latch (circled in the pic below) may be bent too far out of place due to how many times it’s been actuated over the last two and a half decades. I’m not an electrician or mechanic so I’m probably wrong in how it works, but I think the trunk latch is supposed to connect and/or move this little metal tab when you close the hood, breaking the circuit for the hood light until you open the hood again. When the tab is bent too far, the latch never connects with that tab thus the circuit isn’t broken and the light remains on even when the hood is fully closed.
Just bend it back into shape with a screw driver.
Last edited by notabot; Dec 16, 2020 at 07:32 PM.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Theon Goes Full Carbon Fiber With Stunning New Build
Verdad Gallardo
Genius Porsche-Themed Gifts That'll Make Any Dad or Grad Smile
Joe Kucinski
10 Used Porsches Are Selling for Way Too Cheap
Joe Kucinski
Tuner Is Converting Porsche 911s Into Shooting Brakes
Verdad Gallardo
This Coachbuilt Creation Is A Modern Take on the Legendary Porsche 917
Verdad Gallardo
Is This Convertible Cayenne A Steal, Or A Returnless Investment?
Verdad Gallardo
10 Best Non-Flat Six Porsches You Can Buy For Under $100K
Joe Kucinski
Porsche's Top 5 Most Questionable Naming Decisions
Verdad Gallardo
