Glowing red hot exhaust manifold/ coolant gushing from radiator fill-up neck!!!

dgee509 · 04-15-2011, 02:39 AM

After installing a new head gasket and finally getting my 1990 n/a supra to crank I discovered I had a miss. I actually had good throttle response with the miss, but today I installed a new distributor cap, rotary button, plugs, and plug wires. I got it idling perfect with no miss, but when I gave it gas the rpms slowly climbed and topped out at 3500 rpms. Also when I turned the car off I could hear the radiator bubbling and dream was blowing from the overflow tank, so apparently the car got a little hot. Can over heating cause sluggish throttle response? Thanks for any info, I am open to any suggestions!

dgee509 · 04-15-2011, 03:18 AM

So I let the engine cool off and filled the radiator with water. Then I cranked it up with the radiator cap off and tried to rev the engine. Still no throttle response and water was gushing from the fill up neck on the radiator... I have never seen anything like this before! Someone please help! Thanks

Sonyps307 · 04-15-2011, 03:39 AM

thermostat

dgee509 · 04-15-2011, 03:51 AM

Would the thermostat cause my lack of throttle response?

Sonyps307 · 04-15-2011, 03:57 AM

Maybe and did you try calibrating the tps

dgee509 · 04-15-2011, 04:18 AM

I haven't tried that, but I had good throttle response last night before I put the new plugs, wires, distributor cap, and rotor button on... wouldn't that indicate the GPS was functioning properly?

dgee509 · 04-15-2011, 04:56 AM

What the #@&$ am I dealing with here? I just replaced the head gasket on my 1990 n/a supra. Also new plugs, wires, distributor cap, and rotor. I have very very sluggish throttle response and I am lucky to get the car to rev to 3500 rpms, but it idles great... Any ideas? Any input would be greatly appreciated. Thanks

btwilson86 · 04-15-2011, 04:59 AM

Sounds like maybe your ignition timing is off. I can't remember if a red hot manifold is a sign of advanced or retarded timing. But that can also explain your sluggishness.

dgee509 · 04-15-2011, 05:18 AM

Thanks a lot for the info. Any ideas on my coolant issue?

interested! · 04-16-2011, 10:35 AM

Hi!
A glowing exhaust manifold clearly indicates that your ignition setting is RETARDED and needs to be advanced a few degrees.an old tip for setting the ignition was to set the throttle to a fast idle and turn the distributer either way until the revs peaked --this was the best way of finding a starting point to reset the timing , if it " pings "( sounds like coffee beans dropped on a empty biscuit tin = pre-ignition ) under heavy/hard acceleration then it's too far advanced and needs to be retarded (backed off ) a little .I know from experience -- a guy had a van that had the same red hot exhaust problem. this was fitted with opening and closing points system ( very-pre electronic system ( 1970's ) and the points had closed to 0.005 thou. -should have been 0.015 thou. which meant that the spark was late( RETARDED) and therefore the fuel was still being burnt as it was being pushed into the exhaust system ,making the exhaust manifold red, I opened the points (advancing the spark to correct setting )and cured the problem.

04-15-2011, 02:39 AM	#1
dgee509 Stock Join Date: Apr 2011 Location: killen, al Posts: 16	help please! No throttle response After installing a new head gasket and finally getting my 1990 n/a supra to crank I discovered I had a miss. I actually had good throttle response with the miss, but today I installed a new distributor cap, rotary button, plugs, and plug wires. I got it idling perfect with no miss, but when I gave it gas the rpms slowly climbed and topped out at 3500 rpms. Also when I turned the car off I could hear the radiator bubbling and dream was blowing from the overflow tank, so apparently the car got a little hot. Can over heating cause sluggish throttle response? Thanks for any info, I am open to any suggestions!

04-15-2011, 03:18 AM	#2
dgee509 Stock Join Date: Apr 2011 Location: killen, al Posts: 16	update on the problem So I let the engine cool off and filled the radiator with water. Then I cranked it up with the radiator cap off and tried to rev the engine. Still no throttle response and water was gushing from the fill up neck on the radiator... I have never seen anything like this before! Someone please help! Thanks

04-15-2011, 04:56 AM	#7
dgee509 Stock Join Date: Apr 2011 Location: killen, al Posts: 16	Glowing red hot exhaust manifold/ coolant gushing from radiator fill-up neck!!! What the #@&$ am I dealing with here? I just replaced the head gasket on my 1990 n/a supra. Also new plugs, wires, distributor cap, and rotor. I have very very sluggish throttle response and I am lucky to get the car to rev to 3500 rpms, but it idles great... Any ideas? Any input would be greatly appreciated. Thanks

04-15-2011, 04:59 AM	#8
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Sounds like maybe your ignition timing is off. I can't remember if a red hot manifold is a sign of advanced or retarded timing. But that can also explain your sluggishness. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

04-16-2011, 10:35 AM	#10
interested! 3" Exhaust Join Date: Apr 2011 Location: redhill surrey uk Posts: 142	red hot exhaust Hi! A glowing exhaust manifold clearly indicates that your ignition setting is RETARDED and needs to be advanced a few degrees.an old tip for setting the ignition was to set the throttle to a fast idle and turn the distributer either way until the revs peaked --this was the best way of finding a starting point to reset the timing , if it " pings "( sounds like coffee beans dropped on a empty biscuit tin = pre-ignition ) under heavy/hard acceleration then it's too far advanced and needs to be retarded (backed off ) a little .I know from experience -- a guy had a van that had the same red hot exhaust problem. this was fitted with opening and closing points system ( very-pre electronic system ( 1970's ) and the points had closed to 0.005 thou. -should have been 0.015 thou. which meant that the spark was late( RETARDED) and therefore the fuel was still being burnt as it was being pushed into the exhaust system ,making the exhaust manifold red, I opened the points (advancing the spark to correct setting )and cured the problem. Last edited by interested!; 04-16-2011 at 10:54 AM. Reason: adding confirmation of reason

04-15-2011, 03:39 AM	#3
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	thermostat

04-15-2011, 03:51 AM	#4
dgee509 Stock Join Date: Apr 2011 Location: killen, al Posts: 16	Would the thermostat cause my lack of throttle response?

04-15-2011, 03:57 AM	#5
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	Maybe and did you try calibrating the tps

04-15-2011, 04:18 AM	#6
dgee509 Stock Join Date: Apr 2011 Location: killen, al Posts: 16	I haven't tried that, but I had good throttle response last night before I put the new plugs, wires, distributor cap, and rotor button on... wouldn't that indicate the GPS was functioning properly?

04-15-2011, 05:18 AM	#9
dgee509 Stock Join Date: Apr 2011 Location: killen, al Posts: 16	Thanks a lot for the info. Any ideas on my coolant issue?

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