But here's the catch: only once the engine has warmed up does this occur.
Symptoms: I can depress the gas pedal ~25% before the engine bogs down between idle and ~4200 rpm. This only happens once the engine is heating up/at operating temperature, however. Once above 4200 rpm, the car responds normally. Also, once warm, the car is incredibly hard to start; requires much cranking, and sometimes an application of starting fluid (which I don't know whether or not is harmful to the electronic components in the intake).
So far, I've replaced the MAS (~4.8 ohm on the intake air temp sensor vs. ~2.4 ohm), and am going to replace the O2 sensor tomorrow (reading 8.6 ohms vs. 6 ohms spec @ 68F).
I've also checked out the throttle position sensor per the FSM, as well as the EGR valve. These are within operating spec. I have checked the resistances of my plug wires (16Kohm per meter, iirc) and they spec OK. Plugs themselves are fairly new (<5,000 miles), as is the dizzy cap. Fuel and air filters are brand new. I have inspected the air inlet lines, and can find to cracks or holes.
Things I haven't done, but am thinking about: jumpering GND and TEN connectors on the test port while @ operating temp, testing the fuel rail inlet line pressure, testing resistances of the fuel injectors.
Nothing I've done has alleviated my problem. Does anyone know which sensor the ECU takes a reading from between those RPM ranges (or thereabouts) and at operating temperature? That, or the ECU itself, is the likely culprit, IMO.
Any help would be greatly appreciated.
edit: Also, there is no check engine light illuminated during any of these conditions. I have verified that the CEL does work, so it's not a burnt out bulb.
Stumble/lack of power between idle and 4200 rpm on 1.6L DOHC
- Ryan
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Re: Stumble/lack of power between idle and 4200 rpm on 1.6L DOHC
I read first sentence only, and I say "DISTRIBUTOR!"
Edit, I read the rest, and I still say "DISTRIBUTOR!"
Edit, I read the rest, and I still say "DISTRIBUTOR!"
Now with Moderator power!
Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
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Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
Feedback
Re: Stumble/lack of power between idle and 4200 rpm on 1.6L DOHC
Are there any tests I can do to eliminate individual components or pinpoint something? Everything I've read in the FSM suggests that I need to have a cast gold, diamond studded, platinum-plated contact magicounobtainium testing module to figure the dizzy out.
I like to figure out how stuff works, in addition to fixing it
Or should I just replace the whole thing from the cam gear up and call it good?
I like to figure out how stuff works, in addition to fixing it
Or should I just replace the whole thing from the cam gear up and call it good?
- KL01 FrEaK
- Junior Member
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Re: Stumble/lack of power between idle and 4200 rpm on 1.6L DOHC
replace the whole thing, i had the same problem on my DE, these dizzys r weak and fragile, they do their job, but a bit more quality in the build process of its internal coil wouldve been greatly appreciated, my buddy with a ZE Probe GT has been thru 4 dizzys in the past 2 years(wtf) i know right
>> 93' GS -/- DE swap(boosted ZE comin soon)
Re: Stumble/lack of power between idle and 4200 rpm on 1.6L DOHC
Just got back from poking around the distributor, and the resistance readings are all jacked up; one is way too high, and the other is non-existent. The new distributor is on order and should arrive in the next few days. Hopefully that will be the extent of my problems for a while.
Thank you for pointing me in the right direction
Thank you for pointing me in the right direction
Re: Stumble/lack of power between idle and 4200 rpm on 1.6L
Popped the new distributor in today, set the timing, and all is well!
Thanks again for the help
Thanks again for the help