Can setting the P1626 to "no mil light" cause these issues? Ideas?
08-01-2011, 05:53 PM
#1
Can setting the P1626 to "no mil light" cause these issues? Ideas? Here is the background.
A friend of mine recently did a cam and head swap on his car. He also swapped in a 2 bar map sensor because he is going to put a turbo on soon. He came out to my house and pulled the maf off the car and put a straight tube in its place. I changed the car to a 2 bar operating system in hp tuners. I copied the VE table from the old tune over, copied the 105 kpa line into the 210. Multiplied it by 1.25 and interpolated in between...all textbook stuff. I changed the values for the new map to "map sensor liner 200" and "map sensor offset to 10.3". We wrote entire and attempted to start the car.
With this tune the fuel pump was cutting fuel and after about an hour I jumped online and read about others having this issue. I saw a few people say to change this code (P1626) to no mil light. I made the change and sure enough it ran. It idled ok now and we were able to drive. It was getting late so we just made a few scans and got stuff dialed in enough to drive it. During the last run the tach stopped working and the motor started ticking from the top end. He was gonna go home and pull the valve covers and do some inspecting. I re enabled dfco and re flashed and he went on his way.
He gets about 15 miles and texts that his car died along the road...just died and he had some CEL's. I took the laptop up there and I scanned it. I wrote down the following codes
U1000
U1016
U1040
U1096
and one other "U" code that had to do with the brakes.
After looking up the codes up we checked the underhood fuse box...one of the ECU fuses was blown, but all the fuses had been replaced with larger than recommended fuses. We replaced the blown one and crossed our fingers. Tried to start it but nothing. At this point we gave up. It was 11 at night and we were alongside a highway with cars whizzing by so we left the car there.
Now given the above info...does anyone have any ideas? I'm thinking that a harness somewhere is pinched or something. Seeing that the fuses had been replaced with larger ones makes me think this has happened before (he has only had the car about a year). Remember he just did a head and cam swap also...
Attached is the tune file as well incase something looks out of whack there. The tune isn't done, but the stft were in check. The part throttle ve was tuned off the stft and wot was tuned off the wideband.
A friend of mine recently did a cam and head swap on his car. He also swapped in a 2 bar map sensor because he is going to put a turbo on soon. He came out to my house and pulled the maf off the car and put a straight tube in its place. I changed the car to a 2 bar operating system in hp tuners. I copied the VE table from the old tune over, copied the 105 kpa line into the 210. Multiplied it by 1.25 and interpolated in between...all textbook stuff. I changed the values for the new map to "map sensor liner 200" and "map sensor offset to 10.3". We wrote entire and attempted to start the car.
With this tune the fuel pump was cutting fuel and after about an hour I jumped online and read about others having this issue. I saw a few people say to change this code (P1626) to no mil light. I made the change and sure enough it ran. It idled ok now and we were able to drive. It was getting late so we just made a few scans and got stuff dialed in enough to drive it. During the last run the tach stopped working and the motor started ticking from the top end. He was gonna go home and pull the valve covers and do some inspecting. I re enabled dfco and re flashed and he went on his way.
He gets about 15 miles and texts that his car died along the road...just died and he had some CEL's. I took the laptop up there and I scanned it. I wrote down the following codes
U1000
U1016
U1040
U1096
and one other "U" code that had to do with the brakes.
After looking up the codes up we checked the underhood fuse box...one of the ECU fuses was blown, but all the fuses had been replaced with larger than recommended fuses. We replaced the blown one and crossed our fingers. Tried to start it but nothing. At this point we gave up. It was 11 at night and we were alongside a highway with cars whizzing by so we left the car there.
Now given the above info...does anyone have any ideas? I'm thinking that a harness somewhere is pinched or something. Seeing that the fuses had been replaced with larger ones makes me think this has happened before (he has only had the car about a year). Remember he just did a head and cam swap also...
Attached is the tune file as well incase something looks out of whack there. The tune isn't done, but the stft were in check. The part throttle ve was tuned off the stft and wot was tuned off the wideband.
08-03-2011, 07:46 AM
#4
Lots of possibilities from key to connectors, etc..
http://www.google.com/search?q=P1626...ient=firefox-a
I'd start w/ a basic test regimen..
Power everywhere it's supposed to be?
Fuel pressure?
Tach signal?
CLOSE inspection of all wiring.. I agree, someone found it "necessary" to up the fuse capacity..Most likely because they didn't know wtf they were doing...
It's a real PITA to t/s, but there's no magical solution.
Start at the battery and work outward. Recheck EVERY item he messed with during the swap. DO NOT take his word for it.. CHECK IT!
Heads off... Grounds back on?
http://www.google.com/search?q=P1626...ient=firefox-a
I'd start w/ a basic test regimen..
Power everywhere it's supposed to be?
Fuel pressure?
Tach signal?
CLOSE inspection of all wiring.. I agree, someone found it "necessary" to up the fuse capacity..Most likely because they didn't know wtf they were doing...
It's a real PITA to t/s, but there's no magical solution.
Start at the battery and work outward. Recheck EVERY item he messed with during the swap. DO NOT take his word for it.. CHECK IT!
Heads off... Grounds back on?
08-03-2011, 09:06 PM
#6
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From how I read it, P1626 says the theft deterrent is not giving you the
fuel pump enable signal.
If you change that to not light the light, it doesn't change the problem.
I suspect neither would "No Error Reported". But I do not know this
for sure.
Maybe the VATS came "unlinked"? Or some wiring mishap during the
engine work? What if you just jumper the fuel pump relay to IGN?
fuel pump enable signal.
If you change that to not light the light, it doesn't change the problem.
I suspect neither would "No Error Reported". But I do not know this
for sure.
Maybe the VATS came "unlinked"? Or some wiring mishap during the
engine work? What if you just jumper the fuel pump relay to IGN?
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08-04-2011, 07:21 PM
#8
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From how I read it, P1626 says the theft deterrent is not giving you the
fuel pump enable signal.
If you change that to not light the light, it doesn't change the problem.
I suspect neither would "No Error Reported". But I do not know this
for sure.
Maybe the VATS came "unlinked"? Or some wiring mishap during the
engine work? What if you just jumper the fuel pump relay to IGN?
fuel pump enable signal.
If you change that to not light the light, it doesn't change the problem.
I suspect neither would "No Error Reported". But I do not know this
for sure.
Maybe the VATS came "unlinked"? Or some wiring mishap during the
engine work? What if you just jumper the fuel pump relay to IGN?
