[DMCForum] Re: Starting all over...
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[DMCForum] Re: Starting all over...



Bill,

The problem is not limited to 5th. I have an overall lack of power. A
shallow acceleration curve from 0 MPH--->.

Advance is working. I've checked this repeatedly. There is NO advance
at idle.

All plug wires check sat. All plugs show proper wear. Block
temperature is nominal.

I have never -had- an A/C belt on the car. Exhaust pressure is normal
compared to other DeLoreans. No glowing parts.

All fuel system components are new. I have not checked for drooling
injectors because they are new. I guess I could.

I have not done a compression check since I put the engine back
together. I suppose I could do that too.

Martin,

Freq valve did have bad connection. I have fixed this and it works
correctly now. I hear it all the time. Unfortunately I don't have a CO
gas analyzer so I'm doing the dwell method. Perhaps I should pay a
visit to Dave S. I think he has 3 analyzers.

John,

It does sort of seem (to me) to be a lean condition. The car idles
great and starts easily but....

Keep 'em coming guys.

Rich

--- In DMCForum@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote:
> Are you saying problem limited to 5th gear? (Reads as if floored in
> 5th). That's when my predetonation showed up -- lugging in 5th -- and
> you remember can of worms that discussion opened... Is probably too
> much to expect 6000 RPM in 5th, but you should be able to pass 4000.
> 
> How does car behave gears 1-4?
> 
> Ensure centrifugal advance working. That's what picks up slack when
> vacuum drops (wide open throttle).
> 
> *ENSURE* no spark advance at idle. In early ownership tried attaching
> mine to what I thought was ported vacuum (have no cut off solenoid,
> nor a microswitch to drive one. PO just left diaphragm loose). In fact
> was full manifold vacuum, albeit through extremely small orifice.
> Totally killed performance -- 10-13 degrees at idle was actually under
> full advance. During acceleration ignition time surely jumped AFTER TDC.
> 
> Do a compression test. My experience has been PRV can lose cylinders
> with little noticeable effect on engine behavior (doesn't stumble.
> Will rock & roll quite a bit more if you lose whole bank). Yet I still
> passed traffic on 3 cylinders after SEDOC. You'd think CO2
> measurements would pick up dead cylinders (smell horribly rich)... Is
> block temperature COOLER than normal? 
> 
> Ensure all plug wires in fact intact. My #1 is home made replacement
> for fatigue cracked wire (less than one year old!), probably during
> intake manifold work before I re-routed wiring harness. First time
> Louie drove my car was as PRV-5.
> 
> Ensure no injectors dribbling liquid fuel. Think Walt Coe has had
> problems with this. 
> 
> Check for exhaust obstruction. How much pressure do you feel from
> muffler tips? Is system glowing at all?
> 
> Try running without A/C belt -- compressor or idler pulley bearings
> may be DOA and putting up resistance. Drop alternator belt and check
> for free movement of it and water pump.
> 
> Bill Robertson
> #5939
> 
> >--- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> > All right. It turns out I'm NOT going to Las Vegas to attend a 
> > wedding this weekend. This give me a little extra free time.
> > 
> > Here's the issue I want to work on:
> > 
> > I am STILL missing too much horsepower. I have a shallow acceleration 
> > curve. I can get the car beyond 4000 RPMS but it takes quite a while.
> > I realize that 5th gear is NOT for passing but on relatively shallow 
> > grades, I can barely maintain speed by flooring it.
> > I have driven Mike Cohee's car so I know this isn't my imagination.
> > 
> > I have:
> > 
> > 1. All new fuel components.
> > 2. All new ignition components.
> > 3. Eliminated all the vacuum leaks I could find.
> > 4. Verified the timing & that ignition advance functions correctly.
> > 5. Set the CO screw to match Mike's setting (and the manual)
> > 6. Verified vacuum hose routing IAW the diagram in the engine cover.
> > 
> > I am missing a functional WOT microswitch but this is not the sole 
> > cause of my problem. I intend to get into the evap canister area to 
> > check for more vacuum leaks.
> > 
> > Your suggestions are welcome. Thanks,
> > 
> > Rich



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