Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

I need help! 82 5 spd wont run.

Thread Tools
 
Search this Thread
 
Old 04-18-2014, 12:55 AM
  #1  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default I need help! 82 5 spd wont run.

Cranks fine. I have 37 psi fuel pressure at the rail. injectors are firing according to Noid light. Timming maks all line up for cams. Why wont the F'n thing run ?
Old 04-18-2014, 12:56 AM
  #2  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

I have spark too! Forgot to mention
Old 04-18-2014, 12:58 AM
  #3  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

temp II ohms out to about 2,000 ohms. Its about 75 Degrees at the track where the car is as I write this.
Old 04-18-2014, 01:27 AM
  #4  
Mongo
Official Bay Area Patriot
Fuse 24 Assassin
Rennlist Member
 
Mongo's Avatar
 
Join Date: Nov 2001
Posts: 31,653
Received 116 Likes on 61 Posts
Default

Hi, can you verify the AFM's plug is seated correctly? Also a failing AFM can cause hard starting and even failure to run.
Old 04-18-2014, 04:35 AM
  #5  
danglerb
Nordschleife Master
 
danglerb's Avatar
 
Join Date: Oct 2006
Location: Orange, Cal
Posts: 8,575
Received 3 Likes on 3 Posts
Default

Was it running previously?
Last thing done to it?

Getting fuel, but not catching at all, makes me think maybe too rich (could be you need to spend some money), if it was too lean I would think fuel would build up and it would occasionally fire and stumble.

Any gas smell?
Old 04-19-2014, 01:24 PM
  #6  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

sorry guys I've been working on the car non stop for the past few days. We just did an engine swap injectors were firing and have since stopped.

I'll write more latter I think its in the harness some where.Can someone post a diagram of an ECU plug for an 82 5spd with Jetronic injection please or tell me where to find one.

Thanks
Old 04-19-2014, 04:34 PM
  #7  
Mongo
Official Bay Area Patriot
Fuse 24 Assassin
Rennlist Member
 
Mongo's Avatar
 
Join Date: Nov 2001
Posts: 31,653
Received 116 Likes on 61 Posts
Default

Relays?
Old 04-20-2014, 12:06 AM
  #8  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

replaced relays, then jumper ed them. Noid light was flashing but has since stopped. Plan is to replace green wire and Temp II. Then possibly shoot the b!#*h between the eyes. I wanted to run this car in chump car but its looking more and more like an after market ECU might be in order.

That being said I would like to get her running It's sort of become a grudge match at this point a full week 12 hours a day 2- guys. How can it possibly be this difficult.
Old 04-20-2014, 01:39 AM
  #9  
Mrmerlin
Team Owner
 
Mrmerlin's Avatar
 
Join Date: May 2004
Location: Philly PA
Posts: 27,870
Received 2,243 Likes on 1,241 Posts
Default

green wires will stop about 96% of the engines from running,
Also check the resistors at the fender well
Old 04-20-2014, 02:12 AM
  #10  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

Stan I checked the resistors they were both slightly over the max spec. the .4 ohm was .5 and the .6 ohm resistor was .7 Is that enough of a variance to cause a no run situation? Injectors not to fire?
Old 04-20-2014, 02:56 AM
  #11  
82Porsche928
Racer
 
82Porsche928's Avatar
 
Join Date: Sep 2012
Location: Las Vegas, Nv
Posts: 359
Likes: 0
Received 0 Likes on 0 Posts
Default

My 82 5 sp had this problem, I put about 2k in parts into it before realizing the timing had skipped a tooth.... Just saying.
Old 04-21-2014, 03:29 PM
  #12  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 82Porsche928
My 82 5 sp had this problem, I put about 2k in parts into it before realizing the timing had skipped a tooth.... Just saying.
I verified the timing. Every time I changed something so often. It's right on the marks
Old 04-21-2014, 03:38 PM
  #13  
Lizard928
Nordschleife Master
 
Lizard928's Avatar
 
Join Date: Apr 2003
Location: Abbotsford B.C.
Posts: 9,600
Received 34 Likes on 25 Posts
Default

Another vote on the green wire.

Does the FP run with the stock relay?

I know you said you checked the relays. But the fuel injection relay is special and has 2 87 pins which both receive power when the key gets put into the on position.
Old 04-22-2014, 12:16 AM
  #14  
justaguy
Rennlist Member
Thread Starter
 
justaguy's Avatar
 
Join Date: Nov 2007
Location: Edmonton,Alberta
Posts: 1,003
Likes: 0
Received 0 Likes on 0 Posts
Default

No key. ignition switch. Fuel pump runs makes 37 psi then quits. I jumpered ignition relay and fuel pump relay as well as replace with new still same thing no go.
Old 04-22-2014, 12:24 AM
  #15  
IcemanG17
Race Director
 
IcemanG17's Avatar
 
Join Date: Sep 2004
Location: Stockton, CA
Posts: 16,265
Received 71 Likes on 56 Posts
Default

green wire.... My guess is it will run this weekend


Quick Reply: I need help! 82 5 spd wont run.



All times are GMT -3. The time now is 06:57 PM.