Jump to content

  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

  • Help Support FAQ and Upgrade Your Account!

Chasing down tii running problems... Coil dying?

RenaissanceMan
 Share

Recommended Posts

RenaissanceMan Rising Star

RenaissanceMan

Posted
Posted

Had the tii running really great after setting dwell and timing. Drove it for several miles and then it started missing intermittently and not pulling as strong. Got home and double checked dwell and it looked fine. Then had trouble starting the car. Occasionally would start if I assisted with the accelerator pedal, but it would no longer hold an idle. Now when I monitor dwell with my meter, it is erratic. Reset dwell several times trying to chase it down. Bench tested the coil with an ohm meter and primary and secondaries were in spec. However, my dad had an issue on his e24 once where the car would run amazing until it got really hot, and then would die and not start again. Wondering if I have a failing coil. Brand new wires, points, rotor, cap, condenser. Have a mechanical advance dizzy and running older black coil with no ballast resistor. FWIW it is 89 degrees today and I drove the car hard to get her heated up pretty good.

 

Right now letting the car cool and then going to see if the symptoms go away, but I wondered if there could be anything else I'm missing? Could I have a failing dizzy?

Adam in Nashville

'74 2002tii, '90 E30/S52, '72 Alfa GTV, '86 Alfa Spider Veloce, '05 E53 X5, '06 E90 325i,

Link to comment
Share on other sites
  • Replies 34
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Einspritz
Einspritz

This thread started out as a coil issue, then a points issue. Try a set of similar Mercedes' points (I don't remember the Bosch part number offhand) which are of higher quality and don't bounce (tight

Einspritz
Einspritz

That's because:   Your linkage between the pump and intermediate shaft may be worn or The cup at the bottom of the intermediate shaft is worn or The bushings for the "D"

saaron
saaron

Here are the two articles I have, just to share them with the other tii owners.     The "Jim's" article referenced above, and a more thorough article which goes through adjusting the valves,

Posted Images

RenaissanceMan Rising Star

RenaissanceMan

Posted
  • Author
Posted
19 minutes ago, Dudeland said:

You need the ballast to drop the voltage to the coil. Change your coil to a Bosch blue one and you will be fine.


Sent from my iPhone using Tapatalk

 

The old coil was for use without a ballast, as is indicated on the coil, but i had ordered a new blue coil and it just arrived today. Will be testing tomorrow if the weather holds out and will report back!

Adam in Nashville

'74 2002tii, '90 E30/S52, '72 Alfa GTV, '86 Alfa Spider Veloce, '05 E53 X5, '06 E90 325i,

Link to comment
Share on other sites
dlacey Grand Master

dlacey

Posted
Posted

i would revert to the old condensor...modern parts are really unreliable

  • Like 1

'59 Morris Minor, '67 Triumph TR4A, '68 Silver Shadow, '72 2002tii, '73 Jaguar E-Type,

'73 2002tii w/Alpina mods , '74 2002turbo, '85 Alfa Spider, '03 Lotus Elise

Link to comment
Share on other sites
PaulTWinterton Grand Master

PaulTWinterton

Posted
Posted (edited)
39 minutes ago, RenaissanceMan said:

The old coil was for use without a ballast, as is indicated on the coil, but i had ordered a new blue coil and it just arrived today. Will be testing tomorrow if the weather holds out and will report back!

 

Some experts will tell you that the original-original black coil uses a ballast resistor.  New tii (recommended) coils are red and use a ballast resistor.  Actually the coil label is more "inka".  Fine by me. :D

313730804_GaugesinEngine2.jpg.cfa536f1df114b6ede51ede3f44018d9.jpg

 

I've been scoffed at for using a blue coil and resistor.  Never had any issues (that I know of).

Edited by PaulTWinterton

73 Inka Tii #2762958

Link to comment
Share on other sites
SydneyTii Grand Master

SydneyTii

Posted
Posted

I’m about to order a new coil for my Tii, as the throat that accepts the HT lead to dizzy on my black coil is damaged, I am ordering the Bosch blue coil and it is advertised as working better with electronic ignition? I have the same sort of performance issues with mine as well at the moment. Watching with interest, do you need to do anything special swapping in your blue coil? 

Link to comment
Share on other sites
Simeon Grand Master

Simeon

Posted
Posted

Just remember that the US cars are the ones that are mostly fitted with the ballast resistance ignition so you are looking for a coil with a primary resistance if about 3 ohms. 

rtheriaque wrote:

Carbs: They're necessary and barely controlled fuel leaks that sometimes match the air passing through them.

My build blog:http://www.bmw2002faq.com/blog/163-simeons-blog/

Link to comment
Share on other sites
RenaissanceMan Rising Star

RenaissanceMan

Posted
  • Author
Posted
1 hour ago, iinca said:

"....running older black coil with no ballast resistor"

 

^why no ballast resistor?

 

Ballast resistor was previously removed from my car. Here is the current. Pretty positive this was not original, but as you can see the resistance is not compatible with a ballast resistor setup: 

20190704_185035.jpg

20190704_185050.jpg

Adam in Nashville

'74 2002tii, '90 E30/S52, '72 Alfa GTV, '86 Alfa Spider Veloce, '05 E53 X5, '06 E90 325i,

Link to comment
Share on other sites
RenaissanceMan Rising Star

RenaissanceMan

Posted
  • Author
Posted
10 minutes ago, SydneyTii said:

That looks like be beetle coil? 

 

Yeah it's a mystery to me. Even though primary and secondary resistance meters out ok, I still don't trust this thing. Bought the blue coil to at least start with a known compatible component and I will go from there if it doesn't fix the hot running condition. 

  • Like 1

Adam in Nashville

'74 2002tii, '90 E30/S52, '72 Alfa GTV, '86 Alfa Spider Veloce, '05 E53 X5, '06 E90 325i,

Link to comment
Share on other sites
Dudeland Grand Master

Dudeland

Posted
Posted
 
Ballast resistor was previously removed from my car. Here is the current. Pretty positive this was not original, but as you can see the resistance is not compatible with a ballast resistor setup: 
20190704_185035.thumb.jpg.badc735b8345543ace923d53a8e1eebd.jpg
20190704_185050.thumb.jpg.3efa7c4eb758811a4ff63c5f4bf27eaa.jpg

It has been a while but it looks strangely familiar.


Sent from my iPhone using Tapatalk

"Goosed" 1975 BMW 2002

 

Link to comment
Share on other sites
Chris_B Grand Master

Chris_B

Posted
Posted
On 7/1/2019 at 11:59 AM, RenaissanceMan said:

Now when I monitor dwell with my meter, it is erratic. Reset dwell several times trying to chase it down. Bench tested the coil with an ohm meter and primary and secondaries were in spec.

 

What is the theory behind a bad coil causing erratic dwell?

Chris B.

'73 ex-Malaga

Link to comment
Share on other sites
RenaissanceMan Rising Star

RenaissanceMan

Posted
  • Author
Posted
11 minutes ago, Chris_B said:

 

What is the theory behind a bad coil causing erratic dwell?

 

Honestly at this point I don't think a bad coil would affect dwell... It was just strange that I had that happening once the running problems started. I didn't update the post earlier, but when I monitored it yesterday with the motor cold it was no longer erratic. I think it is more likely my analyzer had a bad connection or something at the time.

Adam in Nashville

'74 2002tii, '90 E30/S52, '72 Alfa GTV, '86 Alfa Spider Veloce, '05 E53 X5, '06 E90 325i,

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t

  • I don't like ads!

    I want to support the FAQ!

  • Upcoming Events

  • Supporting Vendors

  • I don't like ads!

    I want to support the FAQ!

×
×
  • Create New...