Re: 89 CSX No start when hot
What does fuel pressure look like when it tries to start hot?
I had trouble also with bigger injectors till I reset the latency in the program.
Is the latency in the cal matching to the injectors installed?
Re: 89 CSX No start when hot
I have not adjusted the latency at all. The fuel pressure is fine when hot, even when cranking from what I can see on the gauge. Anyone know the latency for the 83(?)lb injectors TU sells?
Re: 89 CSX No start when hot
I think Rob's spreadsheet has the Deka's listed. Should be the same injector and at least a place to start I think.
http://www.turbo-mopar.com/forums/sh...to-tune-for-it
Re: 89 CSX No start when hot
Thanks a ton. I'll adjust that and go from there.
Re: 89 CSX No start when hot
Actually, I can't seem to find where it's located. What section is the injector latency in? Also, should I just use the 13v figure based off of that spreadsheet, 12v, or split the difference?
Re: 89 CSX No start when hot
Quote:
Originally Posted by
cordes
Actually, I can't seem to find where it's located. What section is the injector latency in? Also, should I just use the 13v figure based off of that spreadsheet, 12v, or split the difference?
I can't remember, but it is either in fuel modifiers or fuel running or starting.
It is called Battery Offset.
Enter all the values for the different voltages as close as they can get. That may help.
Another thing to try first, try cycling the key to Run a couple times as long as the pump still primed. Then try for a start.
The injectors get a short prime to aid in starting.
Also when cranking they should be getting some PW to aid in starting.
It could also be the starting AIS steps when hot.
I am having the reverse problem with the van. When I start, it fly's up to like 3000 rpm and then settles back. So I've been looking at these same tables to see if I can get that under control.
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Re: 89 CSX No start when hot
Quote:
Originally Posted by
wheming
I can't remember, but it is either in fuel modifiers or fuel running or starting.
It is called Battery Offset.
Enter all the values for the different voltages as close as they can get. That may help.
Another thing to try first, try cycling the key to Run a couple times as long as the pump still primed. Then try for a start.
The injectors get a short prime to aid in starting.
Also when cranking they should be getting some PW to aid in starting.
It could also be the starting AIS steps when hot.
I am having the reverse problem with the van. When I start, it fly's up to like 3000 rpm and then settles back. So I've been looking at these same tables to see if I can get that under control.
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Thanks Wayne. I saw the fuelbatteryoffset table, but didn't realize it was the latency table.
In regard to your issue, have you tried matching the AIS tables with those of the S60? I had the same problem in my CSX, but after adjusting the tables to match the S60, it's a lot better. I need to take them a step farther since I have the 58mm TB on there and we'll see how that goes.
Re: 89 CSX No start when hot
anyone running a 5spd should just plug the AIS hole off. give it 2-4 degrees of timing under 100 degree engine temp and go. The car will fire up and idle at 1100 then work down to idle settings as the engine warms up and the extra timing goes back to stock. You'll have to adjust your foot work a bit but it's so much better than stock IMO. Works in -5 degrees outside temp too.
Re: 89 CSX No start when hot
I set the latency based on a measured voltage during running. I've found some TM's voltage varies from car to car so I try get as close as possible. I setup a spreadsheet that did interpolation based on the provided numbers to get as close as possible to actual voltage.
Re: 89 CSX No start when hot
Quote:
Originally Posted by
cordes
Thanks Wayne. I saw the fuelbatteryoffset table, but didn't realize it was the latency table.
In regard to your issue, have you tried matching the AIS tables with those of the S60? I had the same problem in my CSX, but after adjusting the tables to match the S60, it's a lot better. I need to take them a step farther since I have the 58mm TB on there and we'll see how that goes.
Thanks! I will try that as soon as I get the van back. I'm on a 58mm too.
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Re: 89 CSX No start when hot
Something I ran across with the 58mm throttle body is the only port on the top of the TB is manifold vacuum. If you have your purge solenoid hooked up, it can pull the fuel tank into a vacuum and mess fuel trims. Either go back to a 52mm, or temporarily block off that port on the TB
Re: 89 CSX No start when hot
Quote:
Originally Posted by
GLHNSLHT2
anyone running a 5spd should just plug the AIS hole off. give it 2-4 degrees of timing under 100 degree engine temp and go. The car will fire up and idle at 1100 then work down to idle settings as the engine warms up and the extra timing goes back to stock. You'll have to adjust your foot work a bit but it's so much better than stock IMO. Works in -5 degrees outside temp too.
I've thought about doing that many times, but I always have had good luck with the AIS. I'd like to attempt to fix this issue without taking it out. Yet...
Re: 89 CSX No start when hot
I just like it shut, I tried closing it all off electrically via the cal and it's still just not quite the same. But my statement was more directed at Wayne than you as he's really having an AIS issue. I'm interested to know if the latency fix fixes your issue. A friends van really didn't like to idle right when it was re-started hot. i didn't have access to it enough and he didn't know enough mess with it too much.
Re: 89 CSX No start when hot
Quote:
Originally Posted by
GLHNSLHT2
I just like it shut, I tried closing it all off electrically via the cal and it's still just not quite the same. But my statement was more directed at Wayne than you as he's really having an AIS issue. I'm interested to know if the latency fix fixes your issue. A friends van really didn't like to idle right when it was re-started hot. i didn't have access to it enough and he didn't know enough mess with it too much.
I don't really want to clutter up Cordes' thread...
But I logged the AIS steps on a start, and it was going to start with AIS at 160. It was way less when it was running and idling normally (and I forget the exact number, maybe 26-36 or something @ 1200 rpm)
I'm going to mess with it more once I have the van back.
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Re: 89 CSX No start when hot
No start at all or hard start? My car has an issue with hard start after running, but it will start after about 10 seconds. Haven't tried swapping the throttle body or fuel pump, but I smell fuel so I don't think that is an issue. I have swapped all items you listed.
Re: 89 CSX No start when hot
No start at all. It’s like the car isn’t getting a hep signal but it’s plugged in. I’vE tried different known working units and I get the same results.
Re: 89 CSX No start when hot
Quote:
Originally Posted by
cordes
No start at all. It’s like the car isn’t getting a hep signal but it’s plugged in. I’vE tried different known working units and I get the same results.
I've had the wires on the engine side of the hep connectors break just like the little wires do on the hep side of the connector
- right at the back of the plug
this can lead to a frustrating and fruitless pursuit of a good hep pick up...as you can figure