So I finished installing the new stereo system, took it for a drive and it began to stumble (that's the best I can describe it) on 1st and 2nd gear. Like it stops giving gas for a moment.

Afterwards the stumbling stops and it runs fine.

I park the car for a couple of hours and drive it again and it does it again, and stops after I get to third or fourth gear.

Any thoughts?

Carbs or FI?

Engine size?

Other pertinent information? Like stereo wattage?

We're you pulling any wires in the engine compartment? Check voltage when running.

FI and 1.8, don't know about stereo wattage. Lucky just to figure out how to install the damn thing, Can the stereo actually cause this?

One thing I did realize, just before each run, I would leave the ignition on without starting the car To listen to the stereo to make adjustments. Also the car starts fine and accelerates fine out of my street (slow speed), then I wait at the intersection, then when I Accelarate into second and third it stumbles. I haven't drove he yet today because of a second issue (see below).

Second issue I forgot to mention. While driving the car the second time yesterday, I noticed the brake pedal was not retracting up, it was also stiff. I had to lift it back up with my foot, plus it was slow to retract too, really stiff. The car was braking. Help!

If you had the ingnition on you may have damaged your points . I would check the points and dwell.

Just spoke to my mechanic and he said the same thing.

Might be an excellent time upgrading to this
Click to view attachment

What is it?

This is a 49 dollar kit, that replaces your mechanical points. It sets the dwell perfectly, so you don't have to. Buy 2 of these, keep the spare in the glove box. Just like mechanical points, these modules don't like seeing power when the engine is not running.

Thanks, you got me interested, what are they called and where can I buy?

That's what I have now and I don't have to deal with points and dwell adjustment anymore. Keep on mind that you can still burn it if you leave the ingnition on when the at is not running. In other words you would still have the same issue.

There is many different products by different company's that essentially do the same thing, but I kinda like this one.

ebay link

So I guess I can't have the stereo on with the ignitin on while waiting for the wife at the subway station. I guess it has to be connected directly to the battery.

I wired my stereo into the fuse panel so it gets constant power, even with ignition off. Just have to always remember to turn your stereo off...Search stereo wiring on this forum.

Which fuse did you use and how did you secure it?

There should be some splitters or doubler thingamabob's on the back of the fuse panel that are unused. Just put your fe spade on one of those and an inline fuse.

use the fuse for the cig lighter.

k

C'mon guys, I am new to all this, which fuse is that?

If you can't figure it out, you're not that far from McMarks shop in Sonoma, I'm sure he could get those problems resolved quickly.

Jeff

It's shown in the illustration in your owner's manual.

Thanks Marc, I forgot I have an owner's manual.

Stumbling is now gone. I had Victor at Auto Medic tune-up my car today, which included valve adjustments, oil change, and a Hot Spark eleconic ignition conversion.

Victor also lubed my shift bushings and fixed loose front wheel bearings, which I wasn't aware of.

Drove the car home and it handled beautifully. He really liked my car and said I did well in purchasing it.

He did suggest converting from FI to carbs and installing front and rear sway bars.

For those looking for a Porsche mechanic in Contra Costa and Solano County, who knows his stuff and with reasonable prices, Victor is your man! He does not advertise and just goes by word of mouth.

He did suggest converting from FI to carbs

He said the way my set-up was that I will eventually have issues with the FI and with some parts getting harder to find that I may want to switch to a dual carb set-up. He did say that if I do this, that I should still save all my FI equipment.

Truthfully I would as much as possible keep the stock set-up I have now.

No need for converting to carbs. As long you're proactive with catching any potential vacuum leaks early, you'll be fine. What's your impression with this hot spark pointless module?

It came just in time for the trip to the shop. I had Petronix in my MGB and I am glad this did not cost as much. So far so good, I am happy I don't have to worry about the points anymore. Thanks for suggesting it.