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270 ohm resistor, whats it for?

tomh	Aug 9 2010, 11:44 PM Post #1
Member Group: Members Posts: 322 Joined: 28-February 10 From: san jose Member No.: 11,412 Region Association: None	I have a 2.0 GA in my 72 with the proper ECU and harness.Do I need the 270 ohm resistor on my head temp wire?It runs a little chuncky on low end but has lots of rev and power on top.Will the resistor help with smoothing out the whole range of power. Why do some systems have it and others do not?

Replies

Bleyseng	Aug 10 2010, 06:18 AM Post #2
Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest	(IMG:style_emoticons/default/agree.gif) For a question like this you must post complete info on your setup with part numbers. (IMG:style_emoticons/default/chair.gif)

orange914	Aug 10 2010, 02:51 PM Post #3
http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California	QUOTE(Bleyseng @ Aug 10 2010, 05:18 AM) (IMG:style_emoticons/default/agree.gif) For a question like this you must post complete info on your setup with part numbers. (IMG:style_emoticons/default/chair.gif) (IMG:style_emoticons/default/agree.gif) AND the 73 (only) used the inline resister to MAKE the 73' 1.7 ecu work the first year of 2.0... bandade... get ecu, m.p.s., cht, numbers and check for compatability

tomh	Aug 10 2010, 06:39 PM Post #4
Member Group: Members Posts: 322 Joined: 28-February 10 From: san jose Member No.: 11,412 Region Association: None	QUOTE(orange914 @ Aug 10 2010, 01:51 PM) QUOTE(Bleyseng @ Aug 10 2010, 05:18 AM) (IMG:style_emoticons/default/agree.gif) For a question like this you must post complete info on your setup with part numbers. (IMG:style_emoticons/default/chair.gif) (IMG:style_emoticons/default/agree.gif) AND the 73 (only) used the inline resister to MAKE the 73' 1.7 ecu work the first year of 2.0... bandade... get ecu, m.p.s., cht, numbers and check for compatability I checked Ander's site and I have the correct ECU for the 73 GA motor it does have the control knob on top.Tonite I will look at the rest of the #'s to check for compatabilty of all systems.For some reason the mecanic put the resistor on the car.I took it off and the top end revs and power went up however then my low end and idle got a littel ruff.Should I leave the resistor off and adjust the ECU in hopes it will clear up the idle?if so witch way do I turn the knob?

detoxcowboy	Aug 10 2010, 06:47 PM Post #5
Senior Member Group: Members Posts: 1,294 Joined: 30-January 08 Member No.: 8,642 Region Association: Africa	QUOTE(tomh @ Aug 10 2010, 05:39 PM) QUOTE(orange914 @ Aug 10 2010, 01:51 PM) QUOTE(Bleyseng @ Aug 10 2010, 05:18 AM) (IMG:style_emoticons/default/agree.gif) For a question like this you must post complete info on your setup with part numbers. (IMG:style_emoticons/default/chair.gif) (IMG:style_emoticons/default/agree.gif) AND the 73 (only) used the inline resister to MAKE the 73' 1.7 ecu work the first year of 2.0... bandade... get ecu, m.p.s., cht, numbers and check for compatability I checked Ander's site and I have the correct ECU for the 73 GA motor it does have the control knob on top.Tonite I will look at the rest of the #'s to check for compatabilty of all systems.For some reason the mecanic put the resistor on the car.I took it off and the top end revs and power went up however then my low end and idle got a littel ruff.Should I leave the resistor off and adjust the ECU in hopes it will clear up the idle?if so witch way do I turn the knob? leave it on if you have as stated the correct ecu for a 73 2.0 it needs the 270 ohm resistor.. the 037 ecu works with that resistor, they are made for each other, also I never recomend taking parts off your car you do not know what they are yet.. plus i doubt whomever put it on did soi unwittingly.. if your having an issue post it so you can heare some options// ,

orange914	Aug 10 2010, 07:29 PM Post #6
http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California	QUOTE(detoxcowboy @ Aug 10 2010, 05:47 PM) QUOTE(tomh @ Aug 10 2010, 05:39 PM) QUOTE(Bleyseng @ Aug 10 2010, 05:18 AM) (IMG:style_emoticons/default/agree.gif) For a question like this you must post complete info on your setup with part numbers. (IMG:style_emoticons/default/chair.gif) (IMG:style_emoticons/default/agree.gif) AND the 73 (only) used the inline resister to MAKE the 73' 1.7 ecu work the first year of 2.0... bandade... get ecu, m.p.s., cht, numbers and check for compatability I checked Ander's site and I have the correct ECU for the 73 GA motor it does have the control knob on top.Tonite I will look at the rest of the #'s to check for compatabilty of all systems.For some reason the mecanic put the resistor on the car.I took it off and the top end revs and power went up however then my low end and idle got a littel ruff.Should I leave the resistor off and adjust the ECU in hopes it will clear up the idle?if so witch way do I turn the knob? leave it on if you have as stated the correct ecu for a 73 2.0 it needs the 270 ohm resistor.. the 037 ecu works with that resistor, they are made for each other, also I never recomend taking parts off your car you do not know what they are yet.. plus i doubt whomever put it on did soi unwittingly.. if your having an issue post it so you can heare some options/ i'm no expert here but i'm thinking you need to confirm the mps and cht compatability. could be the mechanic just patched the core issue.

tomh	Aug 10 2010, 10:56 PM Post #7
Member Group: Members Posts: 322 Joined: 28-February 10 From: san jose Member No.: 11,412 Region Association: None	QUOTE(orange914 @ Aug 10 2010, 06:29 PM) QUOTE(detoxcowboy @ Aug 10 2010, 05:47 PM) QUOTE(tomh @ Aug 10 2010, 05:39 PM) QUOTE(Bleyseng @ Aug 10 2010, 05:18 AM) (IMG:style_emoticons/default/agree.gif) For a question like this you must post complete info on your setup with part numbers. (IMG:style_emoticons/default/chair.gif) (IMG:style_emoticons/default/agree.gif) AND the 73 (only) used the inline resister to MAKE the 73' 1.7 ecu work the first year of 2.0... bandade... get ecu, m.p.s., cht, numbers and check for compatability I checked Ander's site and I have the correct ECU for the 73 GA motor it does have the control knob on top.Tonite I will look at the rest of the #'s to check for compatabilty of all systems.For some reason the mecanic put the resistor on the car.I took it off and the top end revs and power went up however then my low end and idle got a littel ruff.Should I leave the resistor off and adjust the ECU in hopes it will clear up the idle?if so witch way do I turn the knob? leave it on if you have as stated the correct ecu for a 73 2.0 it needs the 270 ohm resistor.. the 037 ecu works with that resistor, they are made for each other, also I never recomend taking parts off your car you do not know what they are yet.. plus i doubt whomever put it on did soi unwittingly.. if your having an issue post it so you can heare some options/ i'm no expert here but i'm thinking you need to confirm the mps and cht compatability. could be the mechanic just patched the core issue. I checked the #'s on the ecu mps and cht they all match according to Ander's info.He states to use the resistor and explains how to use the knob on the ecu. I guess its put the resistor back on and try adjusting the ecu to help the idle and low end.then it will be to make sure the mps is correctly working. Any more ideas out there?

orange914	Aug 11 2010, 04:55 PM Post #8
http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California	QUOTE(tomh @ Aug 10 2010, 09:56 PM) I checked the #'s on the ecu mps and cht they all match according to Ander's info.He states to use the resistor and explains how to use the knob on the ecu. I guess its put the resistor back on and try adjusting the ecu to help the idle and low end.then it will be to make sure the mps is correctly working. Any more ideas out there? you said earlier the top end power was negitively effected w/ the resister, i would think the resister should help, not hurt the top end power (richer mix thru out). i think the ecu knob effects only the idle (please correct me if i'm wrong). if thats acurate why did the high rpm power drop off w/ resister? have you ohmed out the cht? is it the correct #? has the m.p.s. been adjusted/messed with? does a leaking m.p.s. have a tendency to either richen or lean out the engine? (question to d-jet smarties) (IMG:style_emoticons/default/beerchug.gif)

avidfanjpl	Aug 11 2010, 05:37 PM Post #9
914 Hemophiliac Group: Members Posts: 720 Joined: 6-April 10 From: Bear, Delaware Member No.: 11,566 Region Association: MidAtlantic Region	When an MPS goes bad, nothing works. They are either working or ruptured. Small leaks can develop, but they immediately affect all modes of operation. The car may not even start. Should flood out if the MPS diaphragm ruptures. The CHTS is also critical, and a broken one will prevent starting at all times. The AAV could be bad and it would mess up idle until the car is warmed up, but it will be hell getting there, and the idle will be at 2500. Any exhaust leak will push idle up and ruin acceleration, and make it run rich. You should be able to be no more than 3 clicks off of click 11 on the idle adjustment on the ECU. There are 21 total clicks, 11 being the dead middle. I am 3 clicks counterclockwise to lean, but then again, I have an out of spec 017 CHTS that gets replaced this week with a 1200 ohm at 70 degrees ambient working CHTS for a 73 2.0L. You have to go one by one through things like dwell at 50, .017 point gap, dizzy timing (27BTDC at 3500 rpm), all intact vacuum hoses, no ignition wires near MPS, a working AAV, decel valve working and hosed correctly. No split elbows into the throttle body, a correctly set TPS, plugs at .026 and all grounds working. And then the right FPR setting at 30PSIG. Each item contributes to rich/lean and acceleration. Especially no plug wires near the MPS. The coil in the MPS is sensitive to plug wires too close. I was a victim of each of the above, and the MPS one was a shocker to see the difference when I moved the 3 plug wire under the intake pipes away from the MPS. Good luck! John

Posts in this topic

tomh 270 ohm resistor Aug 9 2010, 11:44 PM

Tom_T The answer is - well maybe? :blink: It depends u... Aug 10 2010, 12:22 AM

Bleyseng :agree: For a question like this you must post com... Aug 10 2010, 06:18 AM

orange914 :agree: For a question like this you must post co... Aug 10 2010, 02:51 PM

tomh :agree: For a question like this you must post c... Aug 10 2010, 06:39 PM

detoxcowboy [quote name='orange914' post='1354715' date='Aug ... Aug 10 2010, 06:47 PM

orange914 [quote name='tomh' post='1354852' date='Aug 10 20... Aug 10 2010, 07:29 PM

tomh [quote name='tomh' post='1354852' date='Aug 10 2... Aug 10 2010, 10:56 PM

orange914 I checked the #'s on the ecu mps and cht the... Aug 11 2010, 04:55 PM

avidfanjpl When an MPS goes bad, nothing works. They are eith... Aug 11 2010, 05:37 PM

orange914 When an MPS goes bad, nothing works. They are eit... Aug 11 2010, 09:10 PM

Bleyseng When an MPS goes bad, nothing works. They are eit... Aug 13 2010, 04:42 AM

detoxcowboy I have a 2.0 GA in my 72 with the proper ECU and ... Aug 10 2010, 07:48 AM

tomh I have a 2.0 GA in my 72 with the proper ECU and... Aug 10 2010, 08:39 AM

Bleyseng [quote name='detoxcowboy' post='1354531' date='Au... Aug 10 2010, 09:52 AM

detoxcowboy [quote name='detoxcowboy' post='1354531' date='A... Aug 10 2010, 10:22 AM

detoxcowboy [quote name='detoxcowboy' post='1354531' date='Au... Aug 10 2010, 10:18 AM

detoxcowboy [quote name='detoxcowboy' post='1354531' date='Au... Aug 10 2010, 10:26 AM

realred914 you need to find out if yoru engine needs the resi... Aug 10 2010, 08:51 AM

tomh you need to find out if yoru engine needs the res... Aug 10 2010, 09:30 AM

avidfanjpl My car, a really early 73 2.0L (GA000336) never ha... Aug 11 2010, 12:10 AM

tomh My car, a really early 73 2.0L (GA000336) never h... Aug 11 2010, 08:31 AM

avidfanjpl Thanks! These are things I almost have tatooe... Aug 12 2010, 07:43 PM

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