General Volvo Chat Post Your Questions And Comments on any of Volvo's many models.

1995 850 GLT timing question

Thread Tools
 
Search this Thread
 
  #1  
Old 08-20-2021, 06:11 PM
buffle's Avatar
Junior Member
Thread Starter
Join Date: Aug 2021
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default 1995 850 GLT timing question

After trying to start with new spark plugs and wires in, I would get a bad misfire. Tried again, and the motor would crank but wouldn't start. I realized I mismatched the spark plug wires and fixed it, yet it still would only crank. The wires are firmly in their correct spot now; I have spark, fuel + pressure, and air. Do you fellas think the mismatched wire would cause the timing to jump? If so, how big of a headache will this be? Thanks.
 
  #2  
Old 08-21-2021, 10:15 AM
firebirdparts's Avatar
Senior Member
Join Date: May 2012
Location: Kingsport, TN
Posts: 1,939
Likes: 0
Received 45 Likes on 43 Posts
Default

No way. Absolutely not.
 
  #3  
Old 08-21-2021, 10:36 AM
buffle's Avatar
Junior Member
Thread Starter
Join Date: Aug 2021
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks man. Do you have any clue what it could be? I have no idea what to check next :/
 
  #4  
Old 08-21-2021, 11:13 AM
hoonk's Avatar
Senior Member
Join Date: Jul 2020
Location: GA
Posts: 4,769
Received 614 Likes on 579 Posts
Default

Originally Posted by buffle
Do you have any clue what it could be?
More than likely the work you just did.

A. Ran fine
B. Replaced stuff
C. Ran bad
D. Worked on it some more
E. Now does not run.
 
  #5  
Old 08-21-2021, 11:22 AM
buffle's Avatar
Junior Member
Thread Starter
Join Date: Aug 2021
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

I agree, I'll keep tracing my steps back. Thanks big guy
 
  #6  
Old 08-22-2021, 04:30 PM
firebirdparts's Avatar
Senior Member
Join Date: May 2012
Location: Kingsport, TN
Posts: 1,939
Likes: 0
Received 45 Likes on 43 Posts
Default

Welll..... For a no-start, we typically begin by pointing out that there's a relay on top of the radiator called the "main fuel injection relay". The plug that plugs into this relay was held together by some soft vinyl boots that disintegrate and then it'll just unplug itself inside that plug body and you can't even see it. So when you work on the car, it's not uncommon to lose power at this point. When you lose power, the OBD-1 diagnostic thing will quit working and the LED will just be dim. That's a clue. I guess it powers the fuel injectors, but I have observed also that you'll lose spark. It powers a pin or two on the PCM and so that evidently knocks out the ignition system. On a 95 I suspect you actually have a separate Fuel computer and ignition computer anyway, FWIW.

The cam/crank sensors tend to be pretty reliable but they're not forever either.

The fuel pump relay tends to be pretty unreliable. I always jumper mine to see if that's the problem, but if you don't have spark, then obviously don't bother. Concentrate on getting spark first.

As for as getting the spark plug wires going to the right plug, that's on you, of course.

I have never found Hoonks expectation to fully serve me. It's logical but it's just not enough in real life. I have close friends that in your situation would unscrew and then reinstall the spark plugs 2 or 3 times. I don't do that.
 

Last edited by firebirdparts; 08-22-2021 at 04:34 PM.
  #7  
Old 08-23-2021, 02:44 PM
Dingus's Avatar
Senior Member
Join Date: Nov 2020
Location: CT
Posts: 207
Received 20 Likes on 20 Posts
Default

Also check to make sure you installed the rotor part of the distributor correctly.

Just realized you didnt touch this, disregard
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MikeK
Volvo 240, 740 & 940
11
11-13-2013 02:15 PM
kenm.10
Volvo 850
7
12-16-2011 05:22 PM
dfymortorsports
Volvo 850
5
12-09-2011 05:21 PM
djwhizkid
Volvo 850
17
05-07-2010 06:32 AM
sandraqu
Volvo 240, 740 & 940
17
12-30-2009 10:15 AM



Quick Reply: 1995 850 GLT timing question



All times are GMT -5. The time now is 12:21 PM.