Could be spark knock.
If the ignition timing is correct the problem may be with a failed engine sensor.
Spark knock can cause engine failure so it may be best to have it diagnosed professionally.
Search found 651 matches
- Thu Jun 17, 2021 4:06 am
- Forum: TECH: 4A-GE ENGINE
- Topic: Bigport, Weird engine sound
- Replies: 8
- Views: 7319
- Sun May 16, 2021 9:20 am
- Forum: TECH: Corolla AE86
- Topic: Reviving an old chassis, alternative parts?
- Replies: 14
- Views: 10032
Re: Reviving an old chassis, alternative parts?
Bilstein make a specific B6 insert for the AE86 and it is the correct length to give enough travel.
- Fri May 14, 2021 11:35 am
- Forum: TECH: Corolla AE86
- Topic: Reviving an old chassis, alternative parts?
- Replies: 14
- Views: 10032
Re: Reviving an old chassis, alternative parts?
I guess a good question might be to ask what the car is going to be used for? You suggest decent travel suspension and if you really must have coilovers then B6 Bilstein inserts and a weld on coil over conversion kit will give you that at a decent price. Combine it with 14" 2.25" springs o...
- Sat Feb 27, 2021 10:27 pm
- Forum: TECH: Corolla AE86
- Topic: Odd heater behaviour
- Replies: 9
- Views: 7913
Re: Odd heater behaviour
I will double check that Jondee. The actual hose from the tap was hot as l remember it.
- Sat Feb 27, 2021 11:18 am
- Forum: TECH: Corolla AE86
- Topic: Odd heater behaviour
- Replies: 9
- Views: 7913
Re: Odd heater behaviour
So an update... finally managed to get the car out for a run and it looks like the heater core is blocked. Inlet hose is hot but the return hose is stone cold. I really hope that it can be flushed out. Any recommendations for which way to flush it, i.e with the flow or against the flow? Thanks for a...
- Wed Feb 10, 2021 10:24 am
- Forum: TECH: Corolla AE86
- Topic: Odd heater behaviour
- Replies: 9
- Views: 7913
Re: Odd heater behaviour
Thanks for the input guys, I have still yet to get out and test it further. I will report back asap.
- Sat Feb 06, 2021 1:59 am
- Forum: TECH: Corolla AE86
- Topic: Odd heater behaviour
- Replies: 9
- Views: 7913
Re: Odd heater behaviour
Feed and return heater hoses are hot at idle and the heater is working. Weather is a bit crap so I'll need to wait until I can take it out to test them when the heater goes cold. Thanks
- Thu Feb 04, 2021 7:21 am
- Forum: TECH: Corolla AE86
- Topic: Odd heater behaviour
- Replies: 9
- Views: 7913
Re: Odd heater behaviour
Hi Jondee, thanks and all of those things are very plausible and I will check them carefully. Indeed, both of the large diameter radiator hoses are soft, I wonder if that could be it?
- Wed Feb 03, 2021 8:24 am
- Forum: TECH: Corolla AE86
- Topic: Odd heater behaviour
- Replies: 9
- Views: 7913
Odd heater behaviour
AE86 standard heater without air conditioning. Idling heater is ok, fan blowing hot/warm air. Driving, the heater suddenly goes cold after an indeterminate time and stays cold. Any ideas what this might be?
- Mon Jan 11, 2021 2:19 am
- Forum: TECH: Corolla AE86
- Topic: Re doing my tired 7ag motor
- Replies: 3
- Views: 4569
Re: Re doing my tired 7ag motor
Do you have any questions about your rebuild? May as well keep this page active as long as possible...
- Fri Jan 08, 2021 2:41 pm
- Forum: Fun Talk
- Topic: Shock Dyno Data Anyone?
- Replies: 26
- Views: 27928
Re: Shock Dyno Data Anyone?
l think my e-mail address attached to this site is defunct. Can you try via PM please Jayrdee?
- Thu Jan 07, 2021 4:44 am
- Forum: Fun Talk
- Topic: Shock Dyno Data Anyone?
- Replies: 26
- Views: 27928
Re: Shock Dyno Data Anyone?
Jayrdee, yep sent you some details. Whilst I understand that used dampers will give a slightly different result to new ones my TRD's seem about as good as I want for my application. If they have worn to this setting then all the better for getting the data now!
- Sat Jan 02, 2021 2:53 am
- Forum: Fun Talk
- Topic: Shock Dyno Data Anyone?
- Replies: 26
- Views: 27928
Re: Shock Dyno Data Anyone?
Some useful information there Jondee, thanks. My TRD's are 48511-AE881 1127/588N 4-stage adjustable rate Cartridge type I wonder, should we assume the figures on the far left of the image 'GTV' etc are the standard damper rates? Piston test speeds would need to be confirmed and possibly converted. I...
- Fri Jan 01, 2021 3:16 am
- Forum: Fun Talk
- Topic: Shock Dyno Data Anyone?
- Replies: 26
- Views: 27928
Re: Shock Dyno Data Anyone?
I'm very tempted to send you one of the TRD blues. It would be interesting to see the graphs and to see what adjusting them does. For the roads in the U.K most performance dampers feel too stiff in high speed bump, wheels hopping etc. and using softer springs has little or no effect on this behaviou...
- Mon Jul 06, 2020 2:59 am
- Forum: TECH: Corolla AE86
- Topic: Engine Fuse keeps blowing (20V Silvertop Conversion - Tweak Harness/Haltech)
- Replies: 2
- Views: 3320
Re: Engine Fuse keeps blowing (20V Silvertop Conversion - Tweak Harness/Haltech)
I was following this and racking my brain. Thanks for the update and I'm glad you got it sorted.
- Wed Jun 24, 2020 1:36 am
- Forum: TECH: Corolla AE86
- Topic: Check Engine Light, goes off @ 4000 ish rpms
- Replies: 13
- Views: 12332
Re: Check Engine Light, goes off @ 4000 ish rpms
Ok I'm going to throw this out there and it is what I'm thinking, not what I know for certain but it may be worth discussing... Could an O2 sensor be at fault, one that is configured in the ECU to go open loop at above 4200rpm so it would stop reporting a fault over this rpm? Is there another sensor...
- Wed Jun 10, 2020 2:33 am
- Forum: TECH: Corolla AE86
- Topic: Steering Column Adjustment Part/Question
- Replies: 6
- Views: 5885
Re: Steering Column Adjustment Part/Question
The way it is written sounds like you have an adjustable column but the lever is missing?
- Mon Jun 08, 2020 10:35 am
- Forum: TECH: Corolla AE86
- Topic: Steering rack moving
- Replies: 12
- Views: 15109
Re: Steering rack moving
Great, well done and thanks for the feedback.
- Sat Jun 06, 2020 2:39 am
- Forum: TECH: Corolla AE86
- Topic: Steering rack moving
- Replies: 12
- Views: 15109
Re: Steering rack moving
also check the front wheel bearings.
- Fri Jun 05, 2020 1:44 pm
- Forum: TECH: Corolla AE86
- Topic: Steering rack moving
- Replies: 12
- Views: 15109
Re: Steering rack moving
Check the universal joint that connects the steering column to the rack pinion.
- Wed May 06, 2020 11:49 pm
- Forum: TECH: Corolla AE86
- Topic: MRP Flywheel Bolt Options
- Replies: 5
- Views: 4556
Re: MRP Flywheel Bolt Options
Surely MRP can supply the correct bolts for you?
- Fri May 01, 2020 8:01 am
- Forum: TECH: Corolla AE86
- Topic: Syncing throttle bodies question
- Replies: 5
- Views: 5242
Re: Syncing throttle bodies question
You definitely need a tool to measure the air flow as shown by OST The important thing is to adjust the linkage off of idle. A way to do this is to open the throttle a small set amount, this can be done by wedging the cable open. Then you need to adjust the linkages so that each itb reads the same. ...
- Thu Apr 23, 2020 1:44 am
- Forum: TECH: 4A-GE ENGINE
- Topic: HIGH comp Big port carby build with MANY questions
- Replies: 45
- Views: 30537
Re: HIGH comp Big port carby build with MANY questions
Here is a video on valve clearance:
https://www.youtube.com/watch?v=nB8uVQxr3Pw
And one on valve lapping:
https://www.youtube.com/watch?v=YA-edFt6TuU
Some people say that valve lapping is not necessary these days, l'll not comment on that!
https://www.youtube.com/watch?v=nB8uVQxr3Pw
And one on valve lapping:
https://www.youtube.com/watch?v=YA-edFt6TuU
Some people say that valve lapping is not necessary these days, l'll not comment on that!
- Mon Apr 20, 2020 12:10 am
- Forum: TECH: 4A-GE ENGINE
- Topic: HIGH comp Big port carby build with MANY questions
- Replies: 45
- Views: 30537
Re: HIGH comp Big port carby build with MANY questions
No assumption required, anyone who builds an engine and is then surprised by the compression ratio...
"I don't really know what I built"
"I ran a compression test on the cylinders and they all read high, really high, like 15 bar high"
"I don't really know what I built"
"I ran a compression test on the cylinders and they all read high, really high, like 15 bar high"
- Thu Apr 16, 2020 12:26 am
- Forum: TECH: 4A-GE ENGINE
- Topic: HIGH comp Big port carby build with MANY questions
- Replies: 45
- Views: 30537
Re: HIGH comp Big port carby build with MANY questions
That's it jinx, in a nutshell.
- Wed Apr 15, 2020 8:36 am
- Forum: TECH: 4A-GE ENGINE
- Topic: HIGH comp Big port carby build with MANY questions
- Replies: 45
- Views: 30537
Re: HIGH comp Big port carby build with MANY questions
Sorry if the truth doesn't suit you.
- Wed Apr 15, 2020 4:25 am
- Forum: TECH: 4A-GE ENGINE
- Topic: HIGH comp Big port carby build with MANY questions
- Replies: 45
- Views: 30537
Re: HIGH comp Big port carby build with MANY questions
You asked this question: "What supporting mods are the most important?" Throwing those camshafts in and having no facility to fine tune them is a complete waste of time. Here is the thing, to make the power that your build may be capable of you will need to set the carbs up properly but yo...
- Sun Apr 12, 2020 3:08 pm
- Forum: TECH: 4A-GE ENGINE
- Topic: HIGH comp Big port carby build with MANY questions
- Replies: 45
- Views: 30537
Re: HIGH comp Big port carby build with MANY questions
I guess you built this engine to give more power than standard... otherwise why bother? At least two of your questions would be answered by taking the engined to a dyno / rolling road, 98 octane fuel and a good AFR. The weak point of the 4age? The person who tunes it.
- Mon Mar 23, 2020 1:46 pm
- Forum: TECH: 4A-GE ENGINE
- Topic: 20V silvertop potential.
- Replies: 6
- Views: 7211
Re: 20V silvertop potential.
What you gain in revs you lose in low down torque compared to your 2.0
The cams you are considering are only marginally more aggressive than standard. Expect to see similar WHP figures to what you already have unless you go for a fully prepared competition engine where over 200hp is possible.
The cams you are considering are only marginally more aggressive than standard. Expect to see similar WHP figures to what you already have unless you go for a fully prepared competition engine where over 200hp is possible.
- Sat Mar 21, 2020 5:06 am
- Forum: TECH: Corolla AE86
- Topic: Tie rods and battery questitons
- Replies: 3
- Views: 4304
Re: Tie rods and battery questitons
Look in here and download the "body" manual (FSM red section) Adjustment instructions for the tie rods are shown under "front suspension" viewtopic.php?f=9&t=11214