Two cold start oddities..

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wolf_walker
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Posts: 67
Joined: Sun Jul 02, 2006 11:47 pm
Location: North Carolina
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Post by wolf_walker »

I've been driving it a few days with the retarded pump.
It is deffinantly lower on power. Ok for general driving but
it feels like it'd be an effort to get up to interstate speeds.
Or hold them on any sort of incline.

Cold start, had a good low 30's morning this AM.
Fired right up, smoothly, as usual. Tapping the throttle
I can hear it missfire some but not at idle. This is with
cold start pushed in. The throttle/above idle miss is gone
with the cold start handle out. Reasonably normal behavior.

The dash shakes less with the cold start handle IN at idle.
I'd almost say the rpm's drop when cold at idle with the handle out.

I'd also almost say at really light throttle and low speeds(so it's
quiet enough to be able to hear) there is some.. noise. Lifters(hyd head),
marbles, I can't really tell. But there is some anomalous noise there.

Very strange. As for the pump I've had it for years, probly has 200K on it, I'd bet it's never been into. It also sat for a few years. I was expecting it to start leaking or something, not yet though.

This is all pretty subtle, other than the clatter when driving and cold.
The warm running noise you'd have to be used to it or have a really good ear to hear. I'd planned on doing the headgasket in a week or two, I'll probly try and just leave it alone till then. And I doubt it on piston contact, I think I'd know that noise. I've checked the belt timing several times in the course of putting it together, and I can't count how many timing belts I've done before. Not that I couldn't screw up, but I doubt it.

I have new lifters also for when the head is off. It just has that oil weeping down the front thing going, and the rest of it is clean and freshly gasketed so I figure I'll do it now.

One thing that keeps nagging in the back of my mind, is the damn injectors. I got them through my worldpac account at work, and ended up getting two remans and two brand new. Same part number, N014x or something like that. I really should have pop tested them I guess. I might buy some nozzles for some other injectors I have around and do so. Why can't anything be simple.
wolf_walker
Cetane Booster
Posts: 67
Joined: Sun Jul 02, 2006 11:47 pm
Location: North Carolina
Contact:

Post by wolf_walker »

As an update, sort of. I fixed the clatter when cold problem.

I removed the Bosch reman NA14X after about 3K miles
and put in a set of Bosch reman NA13X.

Cold clatter gone, runs crisper, smokes a little on accel,
feel generally more normal.

If anyone can explain the difference between two
reman injectors both spec'd for NA 1.6L motors
I'd be all ears. There is deffinantly a difference though.
My guess is the 13x pops lower, and the early pumps
like mine are calibrated for it, it acts like the timing
is advanced some now, little noise at hot idle, though
it does seem to want some cold start handle to
not miss a beat or two when cold. If Bosch tech would
ever answer the phone I'll ask them one day.
81 Caddy D, 601K
73 Mercedes 280
82 Rabbit LS D
coke

Post by coke »

Come to think of it, I think the NA14X have a longer spring in them than the 13X. If you compare a 13x and 14x body, you will find they are the same length but the two halves are different lengths.
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