Frost Tune...Now IAT Problem?
06-08-2013, 05:38 PM
#1
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Jun 2005
Location: Las Vegas
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Frost Tune...Now IAT Problem? So I got my PCM back yesterday and put it in. It takes a lot of effort to get the car started and running. It will not idle at all without dying. If I get the RPMs above 1,000 or so, it runs okay, but will die as soon as I let off. It also smells like it's running rich.
If I disconnect the IAT, it will start and run just fine. If I connect the IAT while it's running, it will immediately die. Same problem with a new IAT, since the old one broke after disconnecting it multiple time. I'm quite stumped...
If I disconnect the IAT, it will start and run just fine. If I connect the IAT while it's running, it will immediately die. Same problem with a new IAT, since the old one broke after disconnecting it multiple time. I'm quite stumped...
06-08-2013, 06:40 PM
#3
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Jun 2005
Location: Las Vegas
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
I got a reply yesterday, but nothing since. I assume he takes weekends off like everybody else.
Car is a 99 Z28 with just headers, ORY, exhaust and a 3600 stall. Just simple stuff.
Car is a 99 Z28 with just headers, ORY, exhaust and a 3600 stall. Just simple stuff.
06-08-2013, 08:14 PM
#5
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
You might check out your ECT sensor, scan it if you can,
read harness voltage if you can't. ECT is a primary factor
in enrichment for open loop / startup. IAT will also index
this, but a faulted IAT might eliminate all the cold enrich
(there's some stuff that's "X vs ECT vs IAT" tables.
I've seen vehicles with bad ECT connectors that act all
flakey and over-enriched.
read harness voltage if you can't. ECT is a primary factor
in enrichment for open loop / startup. IAT will also index
this, but a faulted IAT might eliminate all the cold enrich
(there's some stuff that's "X vs ECT vs IAT" tables.
I've seen vehicles with bad ECT connectors that act all
flakey and over-enriched.
06-08-2013, 09:07 PM
#6
Staging Lane
Thread Starter
iTrader: (1)
Join Date: Jun 2005
Location: Las Vegas
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Sent it out on Monday from Vegas and got it back Friday.
Reading 5 volts across the ECT connector. Resistance in the sensor looks okay. It runs fine with the ECT connected and IAT disconnected. It dies when the ECT is disconnected.
You might check out your ECT sensor, scan it if you can,
read harness voltage if you can't. ECT is a primary factor
in enrichment for open loop / startup. IAT will also index
this, but a faulted IAT might eliminate all the cold enrich
(there's some stuff that's "X vs ECT vs IAT" tables.
I've seen vehicles with bad ECT connectors that act all
flakey and over-enriched.
read harness voltage if you can't. ECT is a primary factor
in enrichment for open loop / startup. IAT will also index
this, but a faulted IAT might eliminate all the cold enrich
(there's some stuff that's "X vs ECT vs IAT" tables.
I've seen vehicles with bad ECT connectors that act all
flakey and over-enriched.
Trending Topics
06-08-2013, 11:05 PM
#10
Staging Lane
iTrader: (1)
Join Date: Jun 2012
Location: Lexington KY
Posts: 80
Likes: 0
Received 0 Likes
on
0 Posts
sent my pcm out tuesday and got it back saturday. have similar mods as you OP just no stall but my tune is a bit off too. car runs fine but mine smells a little rich too and when i shift from 1st to 2nd (its an auto 01 TA) it kicks VERY bad. all other shifts are firm and smooth but that first shift is very hard
06-08-2013, 11:07 PM
#11
Staging Lane
iTrader: (1)
Join Date: Jun 2012
Location: Lexington KY
Posts: 80
Likes: 0
Received 0 Likes
on
0 Posts
you got it man! pay, box it up then ship it to him, and the shipping back is covered by the 166 youll pay for the tune and shipping! im pleased with my tune and so will you feels great just want that first shift fixed
06-09-2013, 06:43 AM
#12
tune As stated above contact Steve first he will guide you in the direction and give you help in trying to trouble shoot. And be patience a lot of these guys stay super busy, and takes a day or so to get back with you,
Also give us some diagnostics so we can help or the tuner can help out like post sensor reading, what are your IAT or coolant reading, 02 readings, alot of variables, check and post what your voltage readings at the sensor connectors.
Also give us some diagnostics so we can help or the tuner can help out like post sensor reading, what are your IAT or coolant reading, 02 readings, alot of variables, check and post what your voltage readings at the sensor connectors.
